Chocolate Coffee Mug Cake

5 from 5 votes

Ready in minutes, this coffee mug cake is an easy single-serving dessert full of rich chocolate and espresso flavors you’ll love!

Prep Time5

Cook Time1

Total Time6

Course: Dessert

Cuisine: American

Keyword: chocolate, chocolate cake, coffee, dessert, mug cake, single-serving

Servings: servings

Add all of the dry ingredients to a microwave-safe mug. Mix until combined.
1/4 cup all-purpose flour, 2 Tablespoons unsweetened cocoa powder, 1 teaspoon instant espresso powder, 1/4 teaspoon baking powder, 2 Tablespoons sugar, 1/4 teaspoon salt
Add the wet ingredients to the mug with the dry ingredients. Mix again until smooth.
1/2 teaspoon vanilla extract, 3 Tablespoons milk, 3 Tablespoons unsalted butter, 1 large egg
Top with chocolate chunks.
2 ounces dark chocolate chunks
Microwave on high for 1 minute. (See notes.)

For an extra-indulgent dessert, replace the chocolate chunks with a square of dark chocolate instead.

Baking times may vary, depending on the microwave. If the mug cake is still gooey after 1 minute, microwave it for an additional 30 seconds.

Be careful not to overbake your cake! If left in the microwave too long, it will become dry and rubbery.