Sometimes you just want something chocolatey and you want it now. This keto 90-second chocolate mug cake is exactly that – a warm, rich chocolate cake ready in under two minutes.
No need to heat up the oven or dirty a bunch of dishes. You mix everything in the same mug you eat from, pop it in the microwave, and you’re done.
It’s completely low carb and keto friendly, so you can enjoy a real dessert without worrying about it knocking you out of ketosis.
The texture is soft and moist in the center with a nice cakey top. It honestly tastes like a proper chocolate cake, not some sad diet substitute.
If you’ve been missing chocolate desserts on keto, this one is going to make your day.
Why You’ll Love This Recipe
Ready in Under 2 Minutes – When a chocolate craving hits hard you can go from mixing to eating in just 90 seconds flat.
Moist and Cakey Not Rubbery – The combo of butter and heavy cream keeps this mug cake soft and tender unlike most dry microwave cakes.
Perfectly Portioned for One – You get a single serving which means no leftover cake sitting on the counter tempting you to overeat.
Recipe Ingredients
- 3 tbsp Almond Flour
- 2 tbsp Unsweetened Cocoa Powder
- 2 tbsp Granulated Erythritol
- 1/4 tsp Baking Powder
- 1 Large Egg
- 1 tbsp Butter, melted
- 1 tbsp Heavy Cream
- 1/4 tsp Vanilla Extract
- Pinch of Salt
How To Make
Step 1
In a large microwave-safe mug, whisk together the almond flour, cocoa powder, erythritol, baking powder, and a pinch of salt with a fork until there are no lumps.
Step 2
Add the egg, melted butter, heavy cream, and vanilla extract. Stir vigorously with the fork until the batter is completely smooth and uniform in color.
Step 3
Microwave on high for 90 seconds. The cake should be risen and set on top but still slightly moist in the center. If still wet, microwave in 10-second bursts.
Step 4
Let the mug cake rest for 1 minute before eating. This resting time lets the center finish cooking gently without drying out.
Step 5
Top with a dollop of whipped cream or a small square of butter and enjoy straight from the mug.
Tips
Use a Big Mug
This cake rises a lot in the microwave, and if your mug is too small it will overflow and make a mess. Use a mug that holds at least 12 ounces, even though the batter doesn’t look like much when you pour it in.
A wider mug also works better than a tall narrow one. It lets the microwave cook the batter more evenly so you don’t end up with a dry outside and a raw center.
Get Rid of Lumps in the Dry Mix First
Before you add the egg and wet ingredients, take a minute to really break up any clumps in the cocoa powder and almond flour with your fork. Cocoa powder especially loves to clump up, and once you add the egg it becomes way harder to smooth those lumps out.
If you skip this step, you’ll get little pockets of dry cocoa powder in the finished cake that taste bitter and chalky. It only takes about 30 seconds to do this but it makes a big difference.
Don’t Overcook It
The biggest mistake with mug cakes is microwaving them too long. At 90 seconds, the top should look set but the center might still seem slightly wet. That’s exactly what you want because it keeps cooking from the residual heat after you take it out.
If your microwave runs hot, start with 70 seconds and check. Every microwave is different, and even 10 extra seconds can turn this from moist and fudgy into dry and rubbery.
It’s always better to undercook slightly and add time in short bursts than to overdo it from the start.
More Recipes
- Low Carb Red Velvet Mug Cake
- Low Carb Chocolate Lava Cakes
- Keto Triple Chocolate Cake
- Low Carb 2-Minute Chocolate Mousse
- Keto Chocolate Souffle
Frequently Asked Questions
What can I use instead of erythritol?
You can use other keto-friendly sweeteners like monk fruit sweetener or allulose. Monk fruit granulated blends usually work as a 1:1 swap for erythritol, so the same 2 tablespoons should do the trick.
Allulose is another great option and it does not have the cooling aftertaste that some people notice with erythritol. Just keep in mind that allulose is a bit less sweet, so you might want to add a tiny bit more to taste.
Keto 90-Second Chocolate Mug Cake
Ingredients
Method
- In a large microwave-safe mug, whisk together the almond flour, cocoa powder, erythritol, baking powder, and a pinch of salt with a fork until there are no lumps.
- Add the egg, melted butter, heavy cream, and vanilla extract. Stir vigorously with the fork until the batter is completely smooth and uniform in color.
- Microwave on high for 90 seconds. The cake should be risen and set on top but still slightly moist in the center. If still wet, microwave in 10-second bursts.
- Let the mug cake rest for 1 minute before eating. This resting time lets the center finish cooking gently without drying out.
- Top with a dollop of whipped cream or a small square of butter and enjoy straight from the mug.