A frosty keto mocha frappuccino made with coffee ice cubes, cocoa and cream, at an estimated 0.6g net carbs per serving. Freeze the coffee ahead, then blend the drink in about five minutes.
A mocha frappuccino should taste like coffee and chocolate all the way to the bottom of the glass. My version starts with coffee ice cubes: part of the brewed coffee goes into the freezer, and the rest goes into the refrigerator. The cubes bring coffee flavor along with the frost.
The split is simple: freeze 1 cup of the 3 cups of brewed coffee and chill the remaining 2 cups. Give the cubes at least 4 hours to freeze, or make them the night before. Once they're ready, blending and pouring take about 5 minutes.
Cocoa powder gives the drink its mocha flavor, while nut milk and cream soften the coffee's edge. This recipe also uses 1/2 cup of ordinary ice for texture, so coffee cubes reduce dilution rather than eliminating it. Blend just until smooth and serve while it's frosty.
Use the monkfruit blend listed in the card, checking that it measures like sugar. Dissolve a granulated blend in the remaining warm coffee before chilling it; a powdered blend is another way to avoid gritty crystals. Concentrated liquid drops need their own label-guided amount.
The recipe makes four servings. Pour into glasses and add whipped cream if you like, or use coconut cream and coconut whipped cream for the dairy-free option. For a different coffee drink, try my keto cold brew coffee or keto caramel macchiato.
Low Carb Mocha Frappuccino
This homemade mocha frappuccino uses brewed coffee, unsweetened nut milk, cream, a sugar free sweetener and cocoa powder. Freeze the coffee cubes in advance, then blend a batch when you want something cold and chocolatey. For a whipped coffee instead, try my keto mocha dalgona coffee.
Carbs and serving size
The recipe makes four servings of about 1 cup, with an estimated 1.7g total carbs and 0.6g net carbs each. Milk, sweetener and toppings can change those figures. Check the products you use rather than comparing this serving with a different-size café drink.
How to Make It Dairy-Free
Use the coconut cream option in place of heavy cream, and choose unsweetened nut milk for the base. Coconut whipped cream can replace the optional dairy topping. Coconut changes the flavor; check all labels if you need to avoid dairy.
Why I Use Coffee Ice Cubes
Freeze 1 cup of the brewed coffee and refrigerate the remaining 2 cups. When the coffee cubes melt, they add coffee back into the drink. The additional 1/2 cup ordinary ice in the blender still adds some water, so serve the frappuccino promptly for its best flavor and texture.
Pour 1 cup of the brewed coffee into an ice cube tray and freeze until solid, at least 4 hours or overnight. Refrigerate the remaining 2 cups until cold. If using granulated sweetener, dissolve the measured 2 tablespoons in that remaining coffee while it is still warm, then chill. The prep estimate includes freezing time; blending and serving take about 5 minutes.
2
Blend
Add the 2 cups chilled coffee, all of the coffee ice cubes, 1/2 cup ordinary ice, nut milk, heavy cream, cocoa powder and sweetener to a blender. If you already dissolved the sweetener in the coffee, do not add it again. Blend for about 30 seconds, until smooth.
3
Do you want whip with that
Pour into your glass and top with whipped cream.
Nutrition
Per serving: 1 cup
Calories
62
Fat
6.9g
Protein
0.5g
Total carbs
1.7g
Net carbs
0.6g
Nutrition is an estimate calculated from the ingredients listed. Brands vary, so check labels if you track closely.
Frequently Asked Questions
How do I order a keto version at Starbucks?
I've done this a few times when I'm traveling and can't make my own. I ask for an unsweetened iced coffee with extra ice, a sugar-free vanilla syrup, and a splash of heavy cream, then ask them to blend it. Skip the frappuccino base (that's where all the sugar lives). It's not on the menu, but I've never had a barista refuse.
What sweetener works best in a frozen drink?
I've tested a few, and powdered or liquid sweeteners work best. Granular erythritol turns gritty when it hits the ice. I use a powdered monk fruit blend and the texture stays completely smooth. Allulose is another one I've had good luck with because it dissolves cleanly even at cold temperatures.
Can I add protein powder or collagen?
I've tried collagen peptides and they dissolve completely without changing the flavor or texture. If you go with a flavored protein powder, I'd cut back on the cocoa powder a bit so it doesn't get too intense.
What kind of blender do I need?
I use a Ninja and it handles this perfectly. A Vitamix or BlendTec will give you an even smoother result, but my Ninja gets the job done in 30 seconds. The key is having enough liquid so everything moves freely. If it stalls, I add a splash more coconut milk rather than pushing it.
Can I freeze leftovers instead of refrigerating?
I've frozen it for up to a month and re-blended before serving. It holds up well. I just pour leftovers into a freezer-safe container, and when I'm ready, I pop the frozen block into the blender with a splash of coffee or milk. It comes out just as thick as a fresh batch.
Does xanthan gum help keep it from separating?
It keeps the drink from separating once it sits for a few minutes. I don't always add it (I usually drink mine fast enough), but if you're making a batch for the family or want it to hold while you finish something, it makes a real difference.
Can I use instant coffee instead of brewed?
I've tried it and it works fine. I mix 2-3 tablespoons of instant coffee with a cup of hot water, let it cool, then follow the recipe from there. You can freeze the instant coffee mixture into ice cubes the same way. The flavor is a little different from brewed, but it still makes a good drink.
Four servings technically, two and a half in practice because my husband decided he’s quality control now. He’s convinced it needs more cocoa and less sweetener, so at this point I’m just making him a separate blend. A lot of fuss for something that takes five minutes, but that’s what you get for letting someone try it once.
Valerie, the ‘quality control’ husband is a situation I know well. I’ve tested the higher cocoa version (3 tablespoons instead of 2) and it does go more mocha, richer. He’s not wrong. The catch is the sweetener balance shifts when you push the cocoa up, so I’d go to 1.5 tablespoons on the monkfruit and taste from there. Two separate blends at five minutes each is still ten minutes, which beats the $12 Starbucks run for two.
I was sure the heavy cream would make this too thick to blend properly, the kind of ratio that clumps around the blades. It doesn’t. The coffee ice does most of the texture work and everything comes together in under a minute. Four stars because the cocoa is a little quiet by the bottom of the glass, one more tablespoon gets you closer to actual mocha territory.
Hi Brett, that’s fair. I’ve tested it at 3 tablespoons and the chocolate holds all the way down instead of fading, so go ahead and add the extra one. Glad the blending held up for you.
That gritty finish at the bottom of the glass drove me crazy. Granular sweetener just doesn’t dissolve in cold liquid, so I started whisking the monkfruit into the hot coffee before pouring it into the molds. Blends in completely, stays smooth. Still dialing in my cocoa ratio, but that one fix made all the difference.
Used my weekly Starbucks as a keto exception for almost a year. This cut that out. Gets me 90% there, and the coffee ice, didn’t think that part would actually work.
The coffee ice was the part I was least sure about. Water ice just wrecks the flavor once it melts, either that part works or you’re still driving to Starbucks.
Pouring this into my glass on a Saturday morning and the cold cocoa smell sent me right back to college summers, specifically a closing shift at a coffee shop where the free-drink perk was the only reason I stayed past midnight. Always a mocha frappuccino, always felt fancy in a way nothing else did. Fifteen years and I’d stopped looking for anything close. The coconut milk is what does it, that little tropical softness against the bitter cocoa. It just works. Used Kerrygold heavy cream and double-strength brew for the cubes, monkfruit sweetener dissolved completely, no aftertaste. Grateful this exists.
Double-strength cubes is something I keep forgetting to put in the recipe notes, holds the coffee flavor when they melt. And closing shift mocha? College you had taste.
0.6 net carbs, and two people at a potluck last weekend pulled out their phones to verify that number. I brought a pitcher instead of buying drinks and it read as a coffee shop order until I mentioned I’d made it. The coffee ice cubes are what make it work for a crowd (they melt into coffee, not plain water, so the last pour tastes the same as the first). Probably doubling the batch next time.
Added a tablespoon of almond butter when I ran short on heavy cream and it came out creamier than expected. The cocoa picks up this mocha-nut edge when you do it that way, which I wasn’t aiming for at all. Going to try it deliberately next time and see if it holds up.
That mocha-nut thing makes sense once you think about it, cocoa and almond butter basically pull toward each other. Keep the full tablespoon when you go deliberate, probably won’t get the same creaminess with less.
Swapped the coconut milk for unsweetened almond milk and added a splash of vanilla extract, and it came out tasting more like the Starbucks vanilla version I used to get. The coffee ice cube trick is what finally stopped it from going watery on me, which was my whole issue with blended coffee recipes before this one.
Almond milk with vanilla gets you closer to that lighter Starbucks flavor. Coconut pulls it tropical, which I like, but it’s a different drink. And yeah, skip the coffee ice cubes once and it’s immediately obvious why they matter.
Thought the coffee ice cubes were extra hassle until I skipped them once and got brown watery milk. Turns out this beats my usual Starbucks order, which I wasn’t expecting to admit.
Been making this pretty much every week since March. Started with oat milk but switched to coconut milk after the second batch (oat milk made it too sweet, threw off the bitterness balance). The coffee ice cubes are the thing everyone should know going in, regular ice just dilutes it. I add an extra tablespoon of cocoa powder and it comes out closer to a mocha, which is where I wanted it.
My daughter watched me blend this and asked if I ordered delivery from Starbucks (she’s 9 and very suspicious of anything homemade that looks that good). The coffee ice cube trick for keeping it thick without getting watery kind of blew my mind a little.
I’ve made this probably a dozen times since last summer and finally dialed in the coffee ice cube ratio that works for me. Strong brew, freeze it overnight. Never waters down. Already made my first batch of the season this week.
Tried four other keto frapp recipes and every single one goes watery halfway through. The coffee ice cubes here actually fix it. Nothing waters down when it melts.
My 12-year-old has been demanding Starbucks every weekend all spring, so I made her try this instead. She took one sip and immediately asked for another. The coffee ice cube trick is freaking genius and now she thinks I figured out some secret.
The coffee ice cube thing changed my afternoons. Dumping brewed coffee into a mold instead of regular ice felt minor, but the thickness difference isn’t. Full tray stays frozen now so I can throw one together in five minutes any afternoon. Only note: pulled the monkfruit back to 1.5 tablespoons and that’s where I want it.
I’ve made at least four different keto frappuccino recipes trying to solve the same problem: regular ice melts and you end up with coffee-flavored water halfway through. The coffee ice cube method here is the obvious fix I somehow never thought of. The texture holds from first sip to last, and the cocoa powder gives it a depth the other versions were missing. I’d push the sweetener up a touch next time, but this is the closest any of them have gotten.
Switch to powdered if you’re not already. Granular erythritol hits the ice and goes gritty, caps out before you get where you want. Powdered monk fruit you can push all the way up.
