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Fudgy brownie mug cake in a white mug on a kitchen table with a spoon beside it, shot from above.

Brownie Mug Cake

A quick, fudgy brownie mug cake ready in just 5 minutes — perfect for single servings and late-night chocolate cravings.
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Course: Dessert, Snack
Cuisine: American
Prep Time: 3 minutes
Cook Time: 2 minutes
Cooling Time: 1 minute
Total Time: 5 minutes
Servings: 1 mug
Calories: 420kcal
Cost: $1.50

Equipment

  • 1 Microwave-safe mug 12–16 oz; essential for even cooking
  • 1 Fork or whisk for mixing
  • 1 Measuring spoon set for accuracy
  • 1 Microwave for cooking the brownie
  • 1 Small bowl optional; for combining ingredients

Ingredients

  • 2 tablespoon Cocoa powder unsweetened
  • 3 tablespoon All-purpose flour spoon and level
  • 2 tablespoon Sugar white or brown
  • 1 Egg room temperature
  • 2 tablespoon Vegetable oil or melted butter
  • 1 tablespoon Water to thin batter
  • 1 teaspoon Vanilla extract optional but adds aroma
  • ¼ teaspoon Baking powder helps rise slightly
  • 1 pinch Salt balances sweetness
  • 1 tablespoon Chocolate chips for extra fudginess

Instructions

  • Combine flour, cocoa powder, sugar, baking powder, and salt in a microwave-safe mug.
  • Add egg, vegetable oil, vanilla extract, and water. Mix well until smooth.
  • Stir in chocolate chips gently.
  • Microwave for 60 to 90 seconds, until set but still fudgy in the center.
  • Let cool for 1 minute before serving. Optional: top with ice cream or whipped cream.

Notes

Adjust microwave time based on wattage. Do not overcook or it will dry out.

Nutrition

Serving: 120g | Calories: 420kcal | Carbohydrates: 46g | Protein: 7g | Fat: 23g | Saturated Fat: 5g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 13g | Cholesterol: 55mg | Sodium: 190mg | Potassium: 280mg | Fiber: 3g | Sugar: 30g | Vitamin A: 100IU | Calcium: 35mg | Iron: 2.8mg