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close up of a slice of brownie cake with a bite taken out of the corner on a white plate with a fork behind the cake.

The Best Homemade Chocolate Brownie Cake Recipe

This decadent chocolate brownie cake is the best mix of a slightly fluffy chocolate cake and a dense fudgy brownie. You get the best of both worlds with this great recipe. And the best part is that this is all made in one bowl!
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Dessert
Servings 16 bars

Ingredients
  

Brownie Batter

  • 3/4 cup butter (12 tablespoons)
  • 1 cup water
  • 1 1/2 ounces unsweetened baking chocolate
  • 2 cups flour
  • 1 3/4 cups light brown sugar
  • 1/2 tsp baking soda
  • 1/4 tsp salt
  • 1 tsp vanilla extract
  • 3 eggs
  • 1/2 cup sour cream

Chocolate Icing

  • 1/2 cup butter (8 tablespoons)
  • 1 1/2 ounces unsweetened baking chocolate
  • 1/2 cup milk
  • 4 cups powdered sugar
  • 1 tsp vanilla extract

Instructions
 

  • Preheat oven to 375 degrees Fahrenheit and spray a 13"x9" baking dish with non-stick spray. Set aside.
  • In a large saucepan over medium-low heat, add butter, water, and baking chocolate. Stir until chocolate has melted. Remove from heat and allow to cool for 5 minutes.
  • To the same saucepan with the melted chocolate, add flour, brown sugar, baking soda, and salt and mix until well combined. Add in vanilla, eggs, and sour cream and stir well.
  • Pour brownie batter into your prepared baking pan and bake for 30 minutes.
  • Cool on a wire rack for 20 minutes.
  • While the cake is baking, take a small saucepan and add butter, baking chocolate, and milk. Bring mixture to simmer, while stirring constantly. Remove from heat and add in powdered sugar and vanilla.
  • Spread icing over warm brownies and allow the cake to cool completely before cutting into bars. Enjoy!

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