One warm, soft white chocolate macadamia nut cookie from the microwave in about 90 seconds at 70% power — 3.4g net carbs. I built this single-serve, egg-free recipe for nights when I want one fresh cookie, not a whole batch staring at me.
I tested this cookie at full microwave power first. The edges went rubbery, the center stayed raw, and the macadamia nuts had zero toastiness. Dropping to 70% power for 60-90 seconds changed everything. The edges set up, the nuts got warm and toasty, and the white chocolate chips melted into little pockets without scorching. That specific power setting is the result of real testing, not a guess.
What makes this different from every other keto cookie recipe I've posted (like my keto chocolate chip cookies or my almond flour cookies) is the format. One cookie. One bowl. No preheating. Most white chocolate macadamia nut cookie recipes make 12-24, and if you're the only person in your house eating keto, you know what happens to the other 23. You eat them, or you throw them away. Neither feels great.
The texture here comes from a small but deliberate decision: 1 teaspoon of coconut flour alongside the almond flour. I've made dozens of single-serve cookie recipes with almond flour alone, and they all have that slightly gummy center that never quite sets. The coconut flour absorbs just enough moisture to firm the structure without making it dry or crumbly. It's a tiny amount, but it's doing real work.
If you want to batch this (and I'd recommend it), a reader named Stephanie started making six portions of dough on Sundays and refrigerating them separately. Every night, she pulls one out, 75 seconds at 70% power, fresh cookie. That fridge batch method is something I'm now doing myself. The dough holds for 3-4 days without any change in texture or flavor. If you like my microwave peanut butter cookie, this is the white chocolate version of that same single-serve approach.
One more thing I want to be clear about: each cookie has 3.4g net carbs. That's with the sugar-free white chocolate chips and macadamia nuts included. You're not sacrificing anything to get a warm, chewy cookie on a weeknight.
White Chocolate Macadamia Nut Cookie in the Microwave
I built this recipe around one problem: I wanted a single white chocolate macadamia nut cookie without making a whole batch. Everything in here is measured for one cookie. Almond flour, a teaspoon of coconut flour, monk fruit sweetener, softened butter, vanilla, salt, sugar-free white chocolate chips, and chopped macadamia nuts. No eggs, no waiting for dough to chill, no sheet pans. Mix it in a bowl, press it flat, and microwave it. If you’ve tried my keto double chocolate chip cookie for one, this is the same single-serve idea with a completely different flavor profile.
Why Make Just One Cookie?
I used to make full batches of keto cookies and tell myself I’d freeze the extras. I never froze the extras. Single-serve solves that entirely. You make one, you eat one, and there’s nothing left calling your name from the kitchen at 10 PM. If you want more, scale the recipe. But the default is one, and that’s on purpose.
The batch-prep approach works well too. Make 5-6 portions of dough, roll each into a ball, and refrigerate them in separate containers. When you want a cookie, pull one out, press it flat, and microwave. 75 seconds at 70% power, straight from the fridge. No thawing needed. If you like the idea of single-serve keto desserts, my small batch keto sugar cookies use the same small-format philosophy.
The Best Sugar-Free White Chocolate Chips
I’ve tried a few brands, and ChocZero is what I keep coming back to. They’re sugar-free and alcohol-free, which matters because sugar alcohols in other brands can cause that waxy, chalky texture that ruins a cookie. ChocZero uses more cocoa butter than most chocolate chips, which is why they melt into these incredibly creamy pockets instead of just getting soft. That creaminess is what makes the white chocolate flavor actually come through in a single cookie this small. If you love white chocolate in desserts, I also use them in my keto white chocolate fudge.
Are Macadamia Nuts Good for Keto?
Macadamia nuts are one of the best nuts for a low carb diet. One ounce has just 4g total carbs and 2g net carbs. They’re also the fattiest nut you can eat, which is why they taste so buttery and rich. In this cookie, that butteriness pairs with the white chocolate in a way that almond or walnut pieces just don’t match. I rough chop mine into bigger pieces so you actually get bites of macadamia, not little flecks that disappear into the dough. You want to feel the crunch.
Can I Bake This in the Oven Instead?
I’ve made this both ways, and both work. For the oven, line a small baking tray with parchment paper, press your dough into a cookie shape, and bake at 350 degrees for 6-10 minutes until the edges just start going golden. The oven version has slightly crispier edges, which some people prefer. But the microwave saves real time since there’s no preheating. I reach for the microwave on weeknights and save the oven for when I want that crispier finish. If you like oven-baked keto cookies, check out my keto no bake cookies for another option that skips the oven entirely.
How to Make a Microwave White Chocolate Macadamia Nut Cookie
The single most important detail is microwave power level. Set it to 70%, not full power. Full power cooks the outside too fast and leaves the inside raw, which is how you end up with a rubbery puck instead of a cookie. At 70% for 60-90 seconds, the heat distributes evenly enough that the edges set up while the center stays soft and chewy.
After microwaving, let it cool on the counter for a full 3-5 minutes. I know that's hard. But the cookie continues to set as it cools, and if you pick it up too early, it'll fall apart. The cooling is part of the baking process, not optional patience.
A variation I picked up from a reader: try browning the butter on the stove before mixing. It adds about a minute of extra work, but the nutty depth it gives the macadamia nuts is worth it. I've been making it this way every time since I tried it. If you like that toasted, caramelized flavor in cookies like my keto cookie bars, browned butter here does the same thing.
Keto White Chocolate Macadamia Nut Cookie Ingredients
Step by Step Instructions
1
Mix cookie dough
In a small bowl, combine almond flour, butter, monkfruit or erythritol blend sweetener, coconut flour, vanilla, salt and chocolate chips. Use a fork to combine.
2
Roll and press into cookie
Gather all the dough and roll into a ball. Press the ball down to flatten into a cookie shape onto a sheet of parchment paper.
3
Microwave instructions
Bake cookie in the microwave at 70% power for 60-90 seconds. Let cool completely before handling. Cookie will continue to set as it cools.
4
Oven instructions
Bake at 350 degrees for 6-10 minutes or until edges start to get golden brown. Let cool completely before handling as cookie is very delicate.
Nutrition
Per serving: 1 cookie
Calories
319
Fat
28.7g
Protein
4.9g
Total carbs
12.3g
Net carbs
3.4g
Nutrition is an estimate calculated from the ingredients listed. Brands vary, so check labels if you track closely.
Frequently Asked Questions
Why did my cookie come out rubbery in the microwave?
I had this exact problem the first time I made it. Full microwave power cooks the outside too fast while the center stays underdone, and the whole thing turns dense and rubbery. Drop to 70% power for 60-90 seconds and let it cool completely on the counter. The cookie sets as it cools. Two of my readers independently ran into the same full-power mistake before landing on 70%, so it's not just me.
Can I make the dough ahead and refrigerate it?
I started doing this after a reader shared her method and now it's my default. Make 5-6 portions of dough, roll each one into a ball, and store them in separate small containers in the fridge. They hold for 3-4 days. When I want a cookie, I pull one out, press it flat, and microwave at 70% for about 75 seconds straight from the fridge. No thawing, no waiting.
Can I freeze the cookie dough for later?
I've frozen individual dough balls wrapped in plastic wrap and they kept well for about a month. When I'm ready, I let the dough thaw in the fridge overnight, then press and microwave as usual. The texture stays the same as fresh. This is a great way to keep keto cookie dough on hand without any waste.
What's the best brand of sugar-free white chocolate chips for this recipe?
I use ChocZero. I've tested a few brands and ChocZero is the only one that melts into creamy pockets the way real white chocolate chips should. They're sugar-free and alcohol-free, which means more cocoa butter and less of that chalky, waxy texture you get from brands sweetened with sugar alcohols. The difference is obvious in a single-cookie recipe where every ingredient has to pull its weight.
Can I use browned butter instead of softened butter?
I started doing this after a reader suggested it and I haven't gone back. Brown the butter in a small pan for about a minute until it smells nutty and the solids turn golden, then let it cool to room temperature before mixing. The nutty depth it adds makes the macadamia nuts pop. It's one extra minute of work and it transforms the flavor.
How do I know when the microwave cookie is done?
It won't look done when the microwave stops, and that's normal. When I pull mine out, the center still looks slightly underset and soft. The cookie finishes setting as it cools over 3-5 minutes on the counter. If it looks fully baked in the microwave, you've already overcooked it. I wait the full 5 minutes before touching it, even though that's the hardest part.
Can I use regular flour instead of almond flour?
I've only tested this with almond flour (paired with a teaspoon of coconut flour for structure), and the texture depends on that combination. Regular all-purpose flour would work if carbs aren't a concern, but the result will be a different cookie. The almond flour gives it that dense, chewy quality I built the recipe around.
How can I make this cookie dairy-free?
I've swapped the butter for coconut oil and it works. Use the same amount, measured solid. The coconut oil version is a little less rich (butter has a flavor that coconut oil doesn't replicate exactly), but the texture holds up. I'd still use the ChocZero white chocolate chips since they're already dairy-free.
Nine rounds of individual microwave cookies at a birthday dinner and I’m rethinking what ‘single-serve’ means. The 90 seconds is part of the show when people are watching, especially when the macadamias come out still gooey and you can see them set as the cookie cools. Two non-keto friends ate theirs without asking anything about the sweetener or flour. One thing if you’re sequencing these: soften the butter ahead in small bowls so the dough comes together fast. And 70% power. Not full. Full power gives you a different cookie.
Nine rounds at a birthday dinner. I pre-soften in bowls now too when I’m making more than one. Two non-keto friends who didn’t ask? That’s how I know a recipe landed.
Didn’t get why 70% power mattered until batch two. At full power the butter separates before the almond flour sets, which is why microwave cookies go rubbery. Four stars. Timing is machine-specific, but the technique holds.
Denise, measure it solid, same amount as the butter. I’ve done this swap and melted coconut oil makes the dough too loose before it even hits the microwave. Texture holds up well, just slightly less rich since butter has a flavor coconut oil doesn’t fully replicate.
Chop the macadamias smaller than you think (a rough chop leaves big chunks that won’t distribute in one tablespoon of dough). The 70% power thing is real, by the way, the texture is completely different from anything I’ve made in a microwave before. Only thing I’d flag: 2 teaspoons of monk fruit ran a little flat on my first try. I’ve been doing 2.5 since and the sweetness finally hits right. Still making this constantly.
The macadamia tip is right. One tablespoon of dough doesn’t give you a lot of surface area, and a rough chop just means you get one giant chunk in the corner. I’ve been doing smaller pieces too. On the monk fruit, that makes sense. I specify a blend but sweetness lands differently by brand, and 2.5 is probably the smarter default for most.
Eight batches in, yes. I tuned the timing to 72 seconds because mine runs hot, and switched to Lily’s white chocolate chips around batch five. The sweetness lands cleaner against the monk fruit blend than the regular sugar-free chocolate I started with. One exactly right cookie beats rationing a full batch every time.
Eight batches to dial it in. That’s the commitment. I run mine at 70% for 78 seconds, my microwave doesn’t run hot so I have the opposite problem. Haven’t put Lily’s next to ChocZero side by side for this one specifically, but I believe it on the sweetness, Lily’s isn’t as aggressive and with monk fruit blend already running clean that probably tips it. One right cookie beats the whole container-on-the-counter situation, which is why I made it single-serve.
Hosting friends Friday and want to make these after dinner. Can I mix the dough a few hours ahead and refrigerate it, then still microwave at 70% power?
Paige, that’s actually how I do it now. Roll the dough into a ball, drop it in a small container in the fridge a few hours ahead, then microwave straight from the fridge at 70% for 60-90 seconds. Same cookie, way easier when you’re hosting.
Single serve is literally why I clicked. A full batch at my house is gone within the hour (always my fault). Can I make dough balls ahead and freeze them for whenever the craving hits? Pretty new to keto baking, so not sure how almond flour does in the freezer. Do I thaw first, or can it go straight from frozen?
Almond flour freezes great, so yes. I wrap each dough ball in plastic wrap and mine hold for about a month. Let them thaw in the fridge overnight before pressing and microwaving, going straight from frozen changes the texture.
My 9-year-old watched me make this and immediately declared that microwave cookies ‘aren’t real.’ Two minutes later she’d eaten the whole thing before I sat down. Made these a few times now, usually when it’s too hot to think about turning on the oven. One thing I learned: the 70% power setting is not optional. I ran it full blast the first time and got something rubbery.
Used salted butter instead of unsalted and skipped the added salt, and the chocolate chips tasted noticeably better for it. Two minutes to make a cookie and it actually tastes like one. Four stars, but that swap is sticking.
Salt in the butter distributes way more evenly than a pinch does. Makes sense the chocolate comes through more when it’s consistent throughout. Might test this myself.
I’ve been keto for about six months and kept scrolling past microwave cookie recipes because they always sounded like a punishment. Finally caved on a Tuesday night when the craving was not negotiable. The 70% power instruction felt oddly specific so I actually followed it, and when I pulled it out at around 80 seconds I fully expected to be let down. I wasn’t. The macadamia nuts get this warm, almost toasty thing going on and the white chocolate chips stay just soft enough that you get actual melt in every bite, not a waxy smear. My only note is the sweetness felt slightly short with the monk fruit blend I had, so I’ll nudge it up a tiny bit next round. Four stars because I’m being honest, but I’ve already made it three more times this week so take that for what it is.
Never made a microwave cookie before and the 70% power instruction threw me off a little, but it made sense once I saw how it came out (soft center, not rubbery). The macadamia nuts were the right call.
That soft center is the whole point. Looks underdone when you pull it but it sets up in a few minutes on the counter. Macadamias hold up better in the microwave than most nuts too, they stay buttery instead of getting chewy.
Used coconut extract instead of vanilla and the macadamia flavor went from background to front and center. Keeping it at four stars until I try it as written, but I’m already planning batch two.
Coconut and macadamia are basically made for each other, I should’ve listed that as a variation. Try the original too though, the vanilla lets the white chocolate come through more.
Browned the butter first (just 30 extra seconds in the microwave before mixing it in) and this thing tastes like a bakery cookie now. The macadamias hit completely different when there’s that nutty depth underneath them. Not going back to softened.
Found something out the hard way: 70% power is not optional. Ran it at full power for 60 seconds the first time and it came out rubbery all the way through. Dropped to 70% and let it go 80 seconds. Night and day. That slightly crispy edge with a soft center. Also switched to Lily’s white chocolate chips instead of whatever sugar-free ones I had before, and honestly they’re just better. Flavor’s actually closer to real white chocolate.
Start checking at 60 seconds, because microwave wattages vary more than you’d think. Mine needed closer to 75 seconds at 70% power and the center still looked underdone when I pulled it. It firms up completely while it cools.
Made a big batch for book club last Thursday, tripled everything so each person got their own fresh cookie. Told them these came out of a microwave and two women flat-out refused to believe me. The 70% power setting is not just a suggestion, that lower heat is what keeps them from going spongy, and I’m convinced that’s the whole secret.
Tripling worked? I always do mine one at a time so that’s useful to know. And two women refusing to believe you is a better review than anything I could write.
