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Craving something sweet but don’t want to derail your keto goals? This Keto Vanilla Mug Cake is the perfect quick fix. Made with a blend of almond flour and coconut flour, it’s soft, fluffy and ready in under five minutes. The warm vanilla aroma and buttery flavor make it taste like a classic vanilla cupcake-without the sugar or carbs. It’s ideal for a single-serving dessert or a quick afternoon treat.

A yellow polka dot mug filled with a baked mug cake sits on a beige cloth napkin on a grey surface.

Why You Will Love This Recipe

You’re gonna love this Keto Vanilla Mug Cake. It’s everything a dessert should be-soft, moist, and full of flavor, yet totally guilt-free. It satisfies your sweet tooth without spiking your blood sugar and takes just a few simple ingredients and two minutes to make. Whether you’re following a keto lifestyle or just want a quick low-carb treat, this mug cake delivers all the comfort of a bakery-style vanilla cake in a single-serving portion. Plus, it’s endlessly customizable-add berries, nut butter, or sugar-free chocolate for your perfect bite every time.

A small, cylindrical keto vanilla mug cake topped with a swirl of whipped cream is served on a blue plate.

Ingredients

Gather your low carb ingredients and you are ready for a mug cake!

Almond Flour : Provides a soft, tender crumb while keeping the cake low in carbs and gluten-free.
Coconut Flour : Adds structure and helps absorb moisture for the perfect fluffy texture.
Baking Powder: Helps the mug cake rise and stay light and airy.
Allulose: A keto-friendly sweetener that gives the cake a moist texture and mild sweetness without sugar.
Melted Butter : Adds richness and moisture, creating a soft, buttery crumb.
Egg: Binds the ingredients together and helps the cake rise evenly.
Vanilla Extract : Infuses the cake with a warm, comforting vanilla flavor.

How To make Keto Vanilla Mug Cake

Made and cooked in a mug, the washing up is minimal!

A white mug with a yellow handle holds ingredients for a keto vanilla mug cake, featuring white powder and a light-colored mixture, set on a speckled countertop.

In a microwaveable mug, mix the dry ingredients.

A cracked raw egg sits atop flour and other baking ingredients in a white mug with a green handle, ready to become a delicious keto vanilla mug cake on a speckled countertop.

Add the wet ingredients.

A white mug with a green handle filled with keto vanilla mug cake sits on a speckled countertop.

Mix to combine.

A keto vanilla mug cake sits in a green polka dot mug on a folded beige cloth, with a vanilla bean beside it.

Microwave and serve!

Recipe Tips

Mix thoroughly: Whisk the batter well to avoid any flour pockets and ensure a smooth, even texture.
Microwave power: Cooking times vary by microwave strength—start with 60 seconds and add 10-second intervals if needed. The cake should be set but still soft in the center.
Sweetener swaps: You can replace allulose with erythritol or monk fruit sweetener, though the texture may vary slightly.
Flour balance: The combination of almond and coconut flour gives structure and moisture. Avoid substituting one for the other in equal amounts.

Serving Suggestions

Add toppings: Serve with a dollop of whipped cream, a sprinkle of cinnamon, or a few fresh berries for a low-carb finish.

Drizzle it: Try a spoonful of sugar-free chocolate syrup, peanut butter, or keto caramel sauce on top.

Make it extra indulgent: Add a few sugar-free white chocolate chips before microwaving for a gooey surprise inside.

A yellow polka dot mug filled with a keto vanilla mug cake, topped with whipped cream, sits on a brown cloth napkin.

more Keto Mug Cake Recipes

If you have a sweet treat, here are a few more keto mug cake recipes to try:

Keto Brownie Mug Cake

Keto Lemon Mug Cake

Keto Raspberry Mug Cake

Almond Flour Chocolate Mug Cake