Microwave White Chocolate Macadamia Nut Cookie
Published July 5, 2021 • Updated July 20, 2026
This post may contain affiliate links. See my disclosure policy.
I built this single-serve microwave white chocolate macadamia nut cookie for the nights when I want one fresh cookie, not a whole batch staring at me from the counter. It's low carb, egg-free, and ready in about 90 seconds at 70% power.
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.
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.
Explore hundreds of keto recipe videos with step-by-step instructions, tips, and tricks to make keto easy.
Ingredients
2 tablespoons almond flour -
1 tablespoon unsalted butter, softened
-
2 teaspoons monk fruit blend sweetener
-
1 teaspoon coconut flour
-
1/4 teaspoon vanilla
-
pinch of salt
-
1 tablespoon sugar free chocolate chips
-
1 tablespoon chopped macadamia nuts
Step by Step Instructions
Step by Step Instructions
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.
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.
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.
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 disclaimer
The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.
Your Macros. Your Recipes. Calculated in 60 Seconds.
Get personalized keto macros and instantly see which recipes fit your targets. No more guessing what to eat.
Get My Macros + Recipes →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.
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.
My daughter is dairy-free so I'll be swapping the butter for coconut oil. Should I use it melted or at room temp since the recipe calls for softened?
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.
Subway white chocolate macadamia was my whole thing for years.
Mine too. Soft center, macadamia chunks, white chocolate still gooey. 90 seconds in the microwave beats the Subway line.
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.
Yeah, that tracks. I thought 2.5 was just my weird ratio until I switched sweeteners.
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.
Warm butter and vanilla from the microwave and I actually paused. White chocolate macadamia nut was the airport cookie, the one I'd stopped thinking about when I went keto. Turns out 90 seconds and 3.4 net carbs was all it took. The coconut flour does something to the texture that makes it feel real. I wasn't ready for that.
Lakshmi, that coconut flour thing you noticed is real. It gives the cookie a denser, slightly chewier bite that almond flour alone can't do. Not just the macros. The airport cookies were my actual benchmark when I was developing this one. I kept a package in the test kitchen and ate one next to mine after each batch. Took probably eight tries before the texture felt right.
Single serve sounds safe until your daughter finds the bowl.
Pressed the macadamias on top instead of mixing them in, they get this toasted edge you just don't get when they're buried. Worth it.
Doing this next time. The buried ones just steam, never toast.
Egg-free cookies have burned me before, usually chalky or falling apart. This one held together. Coconut flour is doing more work than I gave it credit for.
That ratio was the whole puzzle. One teaspoon of coconut flour to two tablespoons of almond flour and it finally held without getting chalky or crumbly.
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.
Ha. Not real until the whole thing was gone. And yeah, full blast is a rubber disk every time - the 70% is not optional.
I make five little portions of the dry mix at the start of the week and keep them in the pantry, so after dinner it's just butter and vanilla and 90 seconds. The 70% power threw me off at first but it matters (rubbery edges the one time I didn't bother). Beats reaching for a bar, and I actually made it.
Five portions in the pantry is a smarter setup than anything I do. I just make mine fresh each time. The 70% power thing, you only have to skip it once.
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.