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microwave mug brownie - featured image

Microwave Mug Brownie: Easy 2-Minute Peanut Butter Swirl Dessert


  • Author: Grace
  • Total Time: 3 minutes
  • Yield: 1 serving 1x

Description

A quick, fudgy single-serving chocolate brownie with a creamy peanut butter swirl, made entirely in a mug in just two minutes.


Ingredients

Scale
  • 4 tablespoons all-purpose flour
  • 3 tablespoons granulated sugar
  • 2 tablespoons unsweetened cocoa powder
  • 1/4 teaspoon baking powder
  • 1 pinch salt
  • 3 tablespoons milk
  • 2 tablespoons vegetable oil or melted butter
  • 1/4 teaspoon vanilla extract
  • 1 tablespoon creamy peanut butter
  • Optional: mini chocolate chips

Instructions

  1. In a small bowl or directly in a large mug, whisk together the flour, sugar, cocoa powder, baking powder, and salt until no lumps remain.
  2. Add the milk, oil (or melted butter), and vanilla extract to the dry mixture. Stir vigorously until the batter is smooth, glossy, and thick.
  3. Pour the batter into a large 12-ounce microwave-safe mug, filling it about halfway to two-thirds full to allow for rising.
  4. Drop the tablespoon of creamy peanut butter onto the center of the batter. Gently swirl it into the batter with the tip of a spoon to create ribbons; do not mix completely.
  5. Microwave on high for 90 seconds to 2 minutes. Start with 90 seconds, checking if the top is set but the center is still slightly soft. Add 15-30 seconds if needed, but avoid overcooking.
  6. Let the brownie cool in the mug for 1-2 minutes before eating to allow it to set and prevent burning.

Notes

Use a large mug to prevent overflow. If your microwave is weaker than 1000 watts, you may need an extra 30 seconds. For a gluten-free version, use a 1:1 gluten-free flour blend. For a vegan version, use plant-based milk and oil. Do not overcook or the brownie will become rubbery.

  • Prep Time: 1 minute
  • Cook Time: 2 minutes
  • Category: Dessert
  • Cuisine: American

Nutrition

  • Serving Size: 1 mug brownie
  • Calories: 375
  • Sugar: 25
  • Sodium: 150
  • Fat: 18
  • Saturated Fat: 5
  • Carbohydrates: 45
  • Fiber: 2
  • Protein: 8

Keywords: microwave mug brownie, peanut butter swirl, 2 minute dessert, single serving dessert, easy late night snack, chocolate mug cake