Keto Brownie Mug Cake – Explore How To Make!
Craving a rich, chocolatey brownie but sticking to your keto goals? This Keto Brownie Mug Cake hits the sweet spot!
It’s quick, single-serve, and loaded with deep cocoa flavor, making it perfect for a late-night treat or a quick dessert fix.
With just a few simple pantry ingredients and a microwave, you’ll have a fudgy, satisfying brownie in minutes—with no sugar or flour in sight.
This recipe uses almond flour, unsweetened cocoa powder, keto sweetener, and melted butter, along with a touch of vanilla extract and a pinch of salt.
One egg gives the brownie its dense texture, while optional chocolate chips or chopped nuts can enhance richness or crunch.
Whether you’re keeping it classic or putting your own spin on it, this mug brownie is keto dessert gold.
Prep Info
| Prep Time | Cook Time | Total Time | Servings | Diet |
|---|---|---|---|---|
| 3 mins | 1 min | 4 mins | 1 | Keto, Gluten-Free |
Ingredients (with Alternatives)
| Item | Amount | Alternatives |
|---|---|---|
| Almond flour | 2 tbsp | Coconut flour (use only 1 tbsp + extra butter) |
| Unsweetened cocoa powder | 1.5 tbsp | Cacao powder |
| Erythritol (or sweetener) | 1.5 tbsp | Monk fruit, stevia blend, allulose |
| Egg | 1 | Flax-egg (1 tbsp flax + 2.5 tbsp water) |
| Melted butter | 1.5 tbsp | Coconut oil or ghee |
| Vanilla extract | 1/4 tsp | Almond extract |
| Baking powder | 1/4 tsp | Can omit for denser texture |
| Pinch of salt | To taste | Optional |
| Keto chocolate chips | 1 tbsp | Chopped dark chocolate or omit entirely |
Before You Begin…
Before you jump in, melt your butter and prepare your mug. This cake cooks quickly, so having everything ready helps ensure perfect texture.
If you want a lava-like center, undercook by a few seconds. Ready? Let’s get started.
How to Make a Keto Brownie Mug Cake
Step 1: Melt and Prep
Start by melting 1.5 tablespoons of butter directly in your microwave-safe mug. Heat for 15–20 seconds until fully melted.
Tilt the mug to coat the sides with butter—this will help prevent sticking.
Step 2: Mix in the Wet Ingredients
Crack in 1 whole egg and add 1/4 teaspoon of vanilla extract to the melted butter. Whisk with a fork until the mixture is smooth and combined.
Step 3: Add the Dry Ingredients
Add 2 tablespoons of almond flour, 1.5 tablespoons of unsweetened cocoa powder, 1.5 tablespoons of erythritol or your preferred sweetener, 1/4 teaspoon of baking powder, and a small pinch of salt.
Mix everything together until no lumps remain.
Step 4: Fold in Chocolate Chips
If using, gently fold in 1 tablespoon of keto chocolate chips or chopped dark chocolate. This gives the cake a fudgy, melty bite.
Step 5: Microwave to Finish
Microwave the mug cake on high for 60 to 70 seconds. The top should look just set, but feel free to adjust the time depending on how gooey or firm you want your brownie.
Step 6: Cool and Enjoy
Let your mug cake rest for a minute before digging in. It will continue to firm up as it cools. Serve straight from the mug, or loosen the edges and transfer to a plate.
Variations to Try
- Nut-Free Version
Swap the almond flour for sunflower seed flour (same amount) for an allergen-friendly alternative with a similar texture. - Mocha Brownie Cake
Stir in 1/2 teaspoon of instant coffee granules with the dry ingredients for a deeper, more intense flavor. - Peanut Butter Swirl
Add a teaspoon of natural peanut butter into the center before microwaving for a gooey, nutty surprise. - Berry Brownie Cake
Fold in a few fresh raspberries or chopped strawberries for sweet-tart bites in every spoonful. - Coconut Chocolate Brownie
Add 1 tablespoon of shredded unsweetened coconut for extra texture and a tropical twist. You can also replace butter with coconut oil for an even bolder flavor. - Spiced Brownie
Mix in a dash of cinnamon or chili powder to warm up the flavor profile. Perfect for cozy evenings.
Related Recipes You Might Enjoy
Keto Fudge Brownie Mug Cake
Similar in texture and prep, this version is extra moist and dense—almost like a lava cake.
It usually features extra butter or chocolate for a richer, softer bite. Perfect if you’re after an ultra-decadent treat.
Keto Chocolate Brownie Mug Cake
This one uses more cocoa powder and sometimes cream to enhance the chocolate flavor even more. If you’re a chocoholic, this recipe dials it up a notch compared to the standard version.
Final Note
This Keto Brownie Mug Cake is your best friend when cravings strike but you don’t want to break your carb count. It’s rich, quick, and endlessly customizable.
Whether you go classic or experiment with your favorite flavors, it’s always a win in under 5 minutes.
