30 Minute Chocolate Cake (Buttermilk Brownies)

30 Minute Chocolate Cake (Buttermilk Brownies)

This is a moist, delicious cake that you can whip up in a hurry. I originally got it from a cookbook that my mom's cake decorating club, Mile High Cake Decorators, produced back in the 1970s. It was called "Mile High Favorites." All of the members of the club submitted their favorite recipes. I guess you could say it was like an early version of CookPad! This is my go-to cookbook, because it contains many family favs.



32 servings
  1. 1 cup butter
  2. 1 cup water
  3. 1/4 cup cocoa
  4. 2 cup flour
  5. 2 cup sugar
  6. 1/2 tsp salt
  7. 1/2 cup buttermilk
  8. 1 tsp baking soda
  9. 2 eggs
  10. 1 tsp vanilla
  11. 1/2 cup butter
  12. 1/3 cup buttermilk
  13. 1/4 cup cocoa
  14. 1 lb powdered sugar
  15. 1 tsp vanilla
  16. 3/4 cup walnuts (optional)


  1. The last six ingredients are intended for the icing.

  2. CAKE: Heat oven to 375°F. In a microwave safe bowl, boil the butter, water and cocoa. In a mixing bowl, combine the flour, sugar and salt. Pour the butter mixture over the dry ingredients and mix well.

  3. Add the buttermilk, baking soda, eggs and vanilla. Mix well and pour into a greased jelly roll pan or large cookie sheet with deep sides. I like to use a 21 x 15 sheet pan. Bake for 18 - 20 minutes.

  4. Immediately after removing cake from oven, begin making your icing by heating the butter, buttermilk, and cocoa in the microwave. Let it boil for about one minute.

  5. Pour the hot mixture into a large mixing bowl and slowly add the powdered sugar. Beat until smooth and creamy and then add the vanilla.

  6. Pour the icing over the warm cake and spread with a spatula. If desired, sprinkle with walnuts.

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