Chocolate Brownie Birthday Cake

We spent our Friday evening celebrating my Dad’s Birthday. It was a great night filled with delicious BBQ, and Brownie birthday Cake to finish. I had several requests for this recipe after sharing on instagram. This is a combination recipe of my traditional Brownie Berry Cake, but it is just as delightful! Enjoy!

Huckleberry Collective
Huckleberry Collective

Chocolate Brownie Birthday Cake


Chocolate Brownie Birthday Cake
  • 3, 8 inch Round Cake Pans 
  • 2 Boxes of Fudge Brownie Mix
  • 4 Eggs 
  • 1 Cup of Vegetable Oil
  • 1/2 Cup of Water 
  • 2 Sticks of Unsalted Butter (Room Temperature)
  • 3 Cups Powdered Sugar
  • 3/4  Cup of Unsweetened Cocoa Powder
  • 1 Teaspoon Vanilla Paste
  • 3 Tablespoons Heavy Cream
  • Sprinkles


How to cook Chocolate Brownie Birthday Cake

Chocolate Brownie Birthday Cake
  1. Preheat oven to 350 degrees. 
  2. In a large mixing bowl, follow Brownie Mix directions according to box specifics. Once mixed well, divide the mixture evenly between your three 8-inch cake pans (sprayed or greased well).  
  3. Bake for 15-20 minutes or until edges are crispy and center is cooked throughout. You can test with a toothpick in center, and it should come out clean.
  4. Remove from oven, and slide butter knife around the edges of the cake to loosen. Flip over onto cooling rack or parchment surface. They should slide right out of the pans.
  5. In the bowl of a standing mixer, beat the Unsalted Butter and Vanilla Paste together on medium speed for about 5 minutes, or more if needed.
  6. Once Butter and Vanilla Paste  are creamed and fluffy, reduce speed to low, and slowly add in Powdered Sugar and Cocoa Powder.
  7. Once combined, turn the mixer back up to medium speed, and add in the Heavy Cream, one tablespoon at a time. You can add more Cream if necessary. 
  8. Increase speed to Medium-High for 5 minutes, or until smooth.
  9. Begin assembling your cake by starting with the first layer of brownie, and about a half cup of Buttercream. Repeat until the last layer. Spread icing evenly, leaving some parts of the cake exposed if desired. 
  10. Cover top with sprinkles and serve! 


I used Duncan Hines Fudge Brownie Mix.
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