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Quick Gooey Microwave Peanut Butter S’mores Mug Cake

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A fast and easy single-serving mug cake combining peanut butter, chocolate, and marshmallows for a gooey, comforting dessert ready in under 5 minutes.

Ingredients

Scale
  • 4 tablespoons all-purpose flour (about 30 g)
  • 1 tablespoon cocoa powder (7 g)
  • 1/4 teaspoon baking powder
  • Pinch of salt
  • 2 tablespoons granulated sugar (25 g)
  • 3 tablespoons milk (45 ml), any kind
  • 2 tablespoons peanut butter (about 30 g), creamy or crunchy
  • 8 to 10 mini marshmallows
  • 1 tablespoon chocolate chips or chunks (about 15 g)
  • 1/4 teaspoon vanilla extract (optional)

Instructions

  1. In a microwave-safe mug or small bowl, combine 4 tablespoons all-purpose flour, 1 tablespoon cocoa powder, 1/4 teaspoon baking powder, a pinch of salt, and 2 tablespoons granulated sugar. Stir well to evenly distribute the baking powder and cocoa.
  2. Pour in 3 tablespoons milk and 1/4 teaspoon vanilla extract if using. Stir until smooth with no lumps; batter should be slightly thick but pourable.
  3. Drop 2 tablespoons peanut butter into the batter and swirl gently or leave in dollops for gooey pockets.
  4. Scatter 8-10 mini marshmallows and 1 tablespoon chocolate chips over the top, pressing lightly into the batter.
  5. Microwave on high for 60 to 75 seconds. Start with 60 seconds and add 10-second bursts if needed. Cake should puff up and be just set but moist.
  6. Let cool for 1-2 minutes before eating; marshmallows will be molten hot.

Notes

Use a microwave-safe mug to avoid hazards. Start microwaving at 60 seconds and add time in 10-second increments to avoid overcooking. For gluten-free, substitute flour with gluten-free baking blend. For dairy-free, use almond or oat milk and dairy-free peanut butter. Rotate mug halfway if microwave cooks unevenly. Adding a pinch of salt enhances peanut butter flavor.

Nutrition

Keywords: microwave mug cake, peanut butter mug cake, s'mores dessert, quick dessert, easy mug cake, single serving dessert, gooey mug cake

Find it online: https://sagestirs.com/quick-gooey-microwave-peanut-butter-smores-mug-cake-recipe-for-easy-dessert/