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Keto Coconut Flour Mug Cake - Quick, Fluffy, and Satisfying

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Prep Time 5 minutes
Cook Time 2 minutes
Total Time 7 minutes
Servings: 1 servings
Ingredients Method

Ingredients
  

  • Coconut flour: Just a tablespoon or two goes a long way. It’s very absorbent and creates a fluffy crumb.
  • Almond flour (optional but helpful): Adds tenderness and balances the density of coconut flour.
  • Granulated keto sweetener: Erythritol, allulose, or a blend. Choose one that measures like sugar.
  • Egg: Provides structure and lift.
  • Unsweetened milk or cream: Almond milk, coconut milk, or heavy cream to keep the batter moist.
  • Butter or coconut oil: Fat adds richness and keeps the cake soft.
  • Vanilla extract: For flavor and a bakery-style aroma.
  • Baking powder: Helps the cake rise quickly in the microwave.
  • Pinch of salt: Brings out the sweetness and rounds out the flavor.
  • Optional add-ins: Sugar-free chocolate chips, shredded coconut, cinnamon, lemon zest, or a few fresh berries.

Method
 

  1. Melt the fat: In a microwave-safe mug (10 to 12 ounces), add 1 tablespoon butter or coconut oil. Microwave for 15–20 seconds until melted. Swirl to coat the sides lightly.
  2. Whisk the wet ingredients: Add 1 large egg, 2 tablespoons unsweetened milk or 1 tablespoon heavy cream plus 1 tablespoon water, and 1/2 teaspoon vanilla. Whisk with a fork until smooth.
  3. Add dry ingredients: Stir in 1 tablespoon coconut flour, 1 tablespoon almond flour (or use 2 tablespoons coconut flour total if avoiding nuts), 1.5 to 2 tablespoons granulated keto sweetener, 1/2 teaspoon baking powder, and a small pinch of salt.
  4. Mix thoroughly: Whisk until the batter is smooth with no dry pockets. Coconut flour thickens quickly; the batter should be like a thick pancake batter. If it’s too thick, add 1–2 teaspoons more milk.
  5. Add extras (optional): Fold in 1 tablespoon sugar-free chocolate chips, a pinch of cinnamon, or a teaspoon of shredded coconut.
  6. Microwave: Cook on high for 60–90 seconds. Start with 60 seconds, then check. If the center looks wet, continue in 10–15 second bursts. The top should look set and spring back lightly.
  7. Rest: Let the cake sit for 1 minute. This helps the crumb finish setting and improves texture.
  8. Serve: Enjoy straight from the mug, or loosen the edges with a knife and flip onto a plate. Top with a pat of butter, a dollop of whipped cream, or a few berries if your carbs allow.