Keto Mug Cake with Flax-Egg (No Egg Needed!)
Looking for an egg-free, keto-friendly dessert you can whip up in minutes? This Keto Mug Cake with Flax-Egg is just the thing!
Instead of the usual egg, this recipe uses a flaxseed meal mixed with water—known as a flax-egg. It gives the mug cake a moist, cake-like texture while adding fiber and healthy fats.
This quick treat features almond flour as the low-carb base, a little cocoa powder for that chocolatey richness, and a keto-approved sweetener like erythritol or monk fruit.
Melted butter adds richness, and a splash of vanilla enhances the flavor. With a microwave and a few pantry staples, you’re only a minute away from a comforting, chocolate-flavored keto dessert—with no egg required.
Prep Info
| Prep Time | Cook Time | Total Time | Servings | Diet |
|---|---|---|---|---|
| 4 mins | 1 min | 5 mins | 1 | Keto, Egg-Free |
Ingredients (With Alternatives)
| Item | Amount | Alternatives |
|---|---|---|
| Almond flour | 2 tbsp | Coconut flour (use only 1 tbsp) |
| Unsweetened cocoa powder | 1 tbsp | Skip for vanilla version |
| Erythritol (or sweetener) | 1.5 tbsp | Monk fruit, allulose, stevia mix |
| Flaxseed meal | 1 tbsp | Chia seed meal (texture varies slightly) |
| Water (for flax-egg) | 2.5 tbsp | Unsweetened almond milk |
| Baking powder | 1/4 tsp | Optional if not worried about fluffiness |
| Melted butter | 1 tbsp | Coconut oil |
| Vanilla extract | 1/4 tsp | Almond extract |
| Pinch of salt | To taste | Optional |
What You’ll Need
- Microwave-safe mug
- Spoon or mini whisk
- Small bowl (to prepare flax-egg)
- Microwave
Before You Begin…
Start by preparing the flax-egg, as it needs a few minutes to thicken. This step is crucial—it’s what replaces the egg and gives structure to your cake.
While that sets, measure and prep your dry and wet ingredients so everything comes together fast.
How to Make a Keto Mug Cake with Flax-Egg
Step 1: Prepare the Flax-Egg
In a small bowl, combine 1 tablespoon of flaxseed meal with 2.5 tablespoons of water. Stir well and let it sit for at least 5 minutes.
It should become thick and gooey—this acts just like an egg in the batter.
Step 2: Melt the Butter
In your microwave-safe mug, add 1 tablespoon of butter and microwave for about 20 seconds, or until fully melted.
Swirl the melted butter around to lightly grease the sides of the mug for easy release later.
Step 3: Add Dry Ingredients
To the mug, add 2 tablespoons of almond flour, 1 tablespoon of unsweetened cocoa powder, 1.5 tablespoons of erythritol or preferred sweetener, 1/4 teaspoon of baking powder, and a pinch of salt.
Stir the dry mix well so there are no lumps.
Step 4: Mix in the Flax-Egg and Vanilla
Now, pour in your thickened flax-egg and 1/4 teaspoon of vanilla extract.
Stir thoroughly until the batter is smooth and everything is fully incorporated. Scrape the sides of the mug so nothing burns while microwaving.
Step 5: Microwave the Cake
Place the mug in the microwave and cook on high for 60 to 75 seconds. The cake should rise and the top should look set but still slightly moist.
Don’t overcook—this can make it rubbery. If unsure, start with 60 seconds and add 5–10 more as needed.
Step 6: Let It Sit
Once microwaved, let the mug cake cool for 1–2 minutes. This allows it to firm up and makes it easier to eat.
You can enjoy it straight from the mug or loosen the edges with a spoon and transfer it to a plate.
Variations to Try
Explore these creative twists to enhance your mug cake:
- Peanut Butter Chocolate
Add 1 teaspoon of natural peanut butter into the center of the batter before microwaving. It melts and creates a gooey center—like a lava cake! - Berry Boosted Version
Fold in 1 tablespoon of fresh or frozen raspberries or blueberries into the batter. They burst during microwaving and create juicy pockets of flavor. - Nut-Free Option
Replace almond flour with sunflower seed flour (same amount) if you’re avoiding nuts. This keeps it fluffy but allergen-friendly. - Coffee Kick
Stir in 1/2 teaspoon of instant coffee powder with the dry ingredients for a mocha flavor. Great with a keto whipped topping. - Coconut-Flavored Cake
Add 1/2 tablespoon of shredded unsweetened coconut into the batter for added texture and flavor. Replace vanilla with coconut extract for an even deeper tropical twist. - Pumpkin Spice Vibes
Omit the cocoa and mix in 1 tablespoon of pumpkin puree and 1/4 teaspoon of pumpkin spice for a cozy, seasonal dessert. - Zesty Lemon Cake
Skip the cocoa, and use 1/2 teaspoon lemon juice and 1/2 teaspoon zest for a bright, citrusy flavor.
Each variation follows the same method—just swap or add an ingredient or two and adjust sweetness to match!
Final Thoughts
This Keto Mug Cake with Flax-Egg is the ultimate no-fuss, no-egg dessert for low-carb eaters. It’s soft, quick, and customizable.
Whether you’re vegan, allergic to eggs, or just want a change, this single-serve treat gives you delicious results without compromising your keto goals.
Enjoy it as-is or try one of the fun variations
