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Keto Peanut Butter Mug Cake

A single-serving flourless peanut butter cake made in a mug on the stovetop or microwave, sweetened with erythritol for an indulgent keto dessert ready in minutes.

10 minEasyServes 1290 cal/serving

AmericanDessertStovetopKetoLow CarbGluten-FreeSoy-FreeSesame-FreeLow-SodiumPork-FreeNightshade-Free

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Ingredients

  • 3 tbsp natural peanut butter (no added sugar)
  • 1 large egg, beaten
  • 2 tbsp granulated erythritol (or monk fruit sweetener)
  • 1/4 tsp baking powder
  • 1/4 tsp vanilla extract
  • pinch salt
  • 1 tsp unsalted butter

Instructions

  1. 1

    Grease a small oven-safe ramekin or microwave-safe mug with 1 tsp unsalted butter.

  2. 2

    In a small bowl, stir together 3 tbsp natural peanut butter (no added sugar), 1 beaten large egg, 2 tbsp granulated erythritol (or monk fruit sweetener), 1/4 tsp baking powder, 1/4 tsp vanilla extract, and pinch salt until smooth.

  3. 3

    Pour the batter into the prepared mug.

  4. 4

    Stovetop method: place the mug in a small saucepan with 1 inch of water, cover with a lid, and steam over medium heat for 4-5 minutes until the top is just set. Alternatively, microwave on high for 60-90 seconds, checking at 60 seconds.

  5. 5

    Let cool for 1 minute before eating. The cake will be moist and fudgy. Serve warm directly in the mug.

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Questions

What should Keto Peanut Butter Mug Cake look like when it is ready?

Go by the cues in the method rather than the clock. Step 4: cook until the top is just set.

Is there a substitute for baking powder in Keto Peanut Butter Mug Cake?

The entry for Keto Peanut Butter Mug Cake calls for 1/4 tsp baking powder. In its place: For each teaspoon, use a quarter teaspoon of baking soda plus half a teaspoon of cream of tartar.

Can I make Keto Peanut Butter Mug Cake dairy-free?

Yes. The dairy in Keto Peanut Butter Mug Cake is 1 tsp unsalted butter. Swap the butter for olive oil where it melts, or a plant-based block butter where it is creamed. The richness shifts slightly, but the method does not change.

Is Keto Peanut Butter Mug Cake low-carb?

A serving of Keto Peanut Butter Mug Cake carries 12 g of carbohydrate, 1 g of it fiber. Against a strict 20 g keto day that is 60 percent of the budget; against a moderate 100 g low-carb day it is 12 percent.

How many carbs are in Keto Peanut Butter Mug Cake?

One serving (the recipe makes 1) has 12 g of carbohydrate in about 290 calories, with 8 g protein and 16 g fat, plus 1 g fiber and 160 mg sodium. The figures are estimates computed from the ingredient list.

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