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Easy 5-Ingredient Microwave Mug Brownie in 1 Minute

easy 5-ingredient microwave mug brownie - featured image

A rich, fudgy brownie made in a mug with just 5 simple ingredients and ready in 1 minute. Perfect for late-night cravings or a quick single-serving dessert.

Ingredients

Scale
  • 3 tablespoons all-purpose flour (24g)
  • 3 tablespoons granulated sugar (36g)
  • 2 tablespoons unsweetened cocoa powder (12g)
  • 2 tablespoons vegetable oil (30ml)
  • 3 tablespoons water (45ml)
  • Optional: pinch of salt
  • Optional: 1/4 teaspoon vanilla extract
  • Optional: chocolate chips or chopped nuts for topping

Instructions

  1. In a microwave-safe mug (12 oz / 350ml), combine 3 tablespoons all-purpose flour, 3 tablespoons granulated sugar, and 2 tablespoons unsweetened cocoa powder. Stir with a fork until evenly combined, breaking up any clumps.
  2. Add 2 tablespoons vegetable oil and 3 tablespoons water. Stir until smooth and thick, scraping the bottom and sides of the mug. Adjust consistency if needed (add a teaspoon of water if too thick, or a teaspoon of flour if too thin).
  3. If desired, stir in optional add-ins like chocolate chips, nuts, or a pinch of salt.
  4. Microwave on high for 45-60 seconds. Start checking at 45 seconds; the brownie should look set on top but slightly moist in the center. Cooking time varies by microwave wattage.
  5. Carefully remove the mug (it will be hot) and let it rest for 1-2 minutes to finish setting.
  6. Enjoy warm with a spoon. Optionally top with vanilla ice cream, whipped cream, or a drizzle of peanut butter.

Notes

Microwaves vary in power. Start checking at 40 seconds for high-wattage microwaves (1200W) and up to 60 seconds for lower wattage (700W). The brownie continues to cook from residual heat, so it’s better to undercook slightly than overcook. For a deeper chocolate flavor, substitute 1 tablespoon of water with milk or brewed coffee. Use a standard 12 oz mug with straight sides for even cooking.

Nutrition

Keywords: mug brownie, microwave brownie, 5-ingredient brownie, single serving brownie, quick dessert, vegan brownie, gluten-free brownie option