Frosted Buttermilk Brownies Recipe

Indulge in these unbelievably moist and decadent Frosted Buttermilk Brownies! This family-favorite recipe, passed down from a close friend, delivers brownies that are lighter than your typical dense variety, but still incredibly rich and flavorful. Perfect for brownie lovers who appreciate a less chewy texture, or easily customizable to your preference by adjusting the baking soda. The creamy, dreamy frosting is the perfect complement! This recipe is also easily doubled to make a delicious buttermilk cake. Forget the boxed mix – this recipe will become your new go-to!

Prep Time 20 mins
Cook Time 40 mins
Calories 293 kcal
Protein 4g
Rating 4.0 (2 Reviews)
Frosted Buttermilk Brownies 13

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Recipe Author

Chef Forktionary, author of this recipe

Recipe adapted from Food.com. Standardized by Forktionary.

Ingredients for Frosted Buttermilk Brownies

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How to Make Frosted Buttermilk Brownies

  1. Preheat oven to 350°F (175°C).
  2. In a small saucepan, bring 1/2 cup water to a low boil.
  3. Remove from heat and whisk in 1/2 cup (1 stick) unsalted butter and 4 tablespoons unsweetened cocoa powder until smooth.
  4. In a large bowl, whisk together 1 3/4 cups all-purpose flour, 3/4 cup granulated sugar, 1/2 cup packed brown sugar, 1 teaspoon baking powder, 1/2 teaspoon baking soda, 1/4 teaspoon salt.
  5. Gradually add the warm butter-cocoa mixture to the dry ingredients, mixing until just combined.
  6. In a separate bowl, whisk together 2 large eggs and 1/2 cup buttermilk.
  7. Add the wet ingredients to the batter and mix until just combined. Be sure to scrape down the sides and bottom of the bowl.
  8. Grease and dust with cocoa powder a half-sheet pan (approximately 13x18 inches), or line with parchment paper.
  9. Pour batter into the prepared pan and spread evenly. Tap the pan gently to remove air bubbles.
  10. Bake for 20-25 minutes, or until a toothpick inserted into the center comes out with moist crumbs attached. Rotate the pan halfway through baking for even cooking.
  11. Let the brownies cool completely in the pan before frosting.
  12. For the frosting: Combine 1/2 cup (1 stick) unsalted butter, 3 cups powdered sugar, 1/4 cup unsweetened cocoa powder, 1/4 cup milk, and 1 teaspoon vanilla extract in a medium bowl. Mix until smooth and creamy.
  13. Refrigerate the frosting until ready to use. Frosting is easier to spread when slightly chilled.
  14. Once the brownies are completely cool, frost and cut into squares. Enjoy!

Nutrition Information (Approximate per serving)

Sodium

4 g

Sugar

142g

Fat

38g

Carbs

14g