Root Beer Float Cake

Anita Hoffman


This is a perfect summer dessert, which is great for picnics, graduation parties, etc. A truly magical cake. Serve with vanilla ice cream.
Recipe and photo adapted from Brown Eyed Baker.


★★★★★ 1 vote

one 10 inch Bundt cake
30 Min
45 Min


  • 2 c
    root beer (do not use diet root beer)
  • 1 c
    dark unsweetened cocoa powder
  • 1/2 c
    unsalted butter, cut into 1 inch pieces
  • 1-1/4 c
  • 1/2 c
    dark brown sugar
  • 2 c
  • 1-1/4 tsp
    baking soda
  • 1 tsp
  • 2

  • 2 oz
    dark chocolate, melted and cooled slightly
  • 1/2 c
    unsalted butter, softened
  • 1 tsp
  • 1/4 c
    root beer
  • 2/3 c
    dark, unsweetened cocoa powder
  • 2-1/2 c
    powdered sugar

How to Make Root Beer Float Cake


  1. In a medium saucepan, heat the root beer, cocoa powder and butter over medium heat until the butter is melted.
    Add the sugars and whisk until dissolved.
    Remove from the heat and let cool.
  2. In a medium bowl, whisk the dry ingredients together.
  3. In a small bowl, whisk the eggs just until beaten, then whisk them into the cooled cocoa mixture until combined.
    Gently fold the flour mixture into the cocoa mixture.
    The batter will be slightly lumpy, which is okay.
    Do not overbeat it, as it could cause the cake to be tough.
  4. Pour batter into a greased and floured 10 inch Bundt pan and bake at 325 degrees for 40 to 45 minutes, rotating the pan halfway through the baking time, until a small sharp knife inserted into the cake comes out clean.
    Transfer the pan to a wire rack to cool completely.
    Gently loosen the sides of the cake from the pan and turn it out onto the rack.
  5. ROOT BEER FUDGE FROSTING: Put all the ingredients in a food processor.
    Pulse in short bursts until the frosting is shiny.
    If you don't have a food processor, use a stand mixer or a hand mixer and mix on medium-low until combined.
  6. Use a spatula to spread the fudge frosting over the cake in a thick layer.
    Let the frosting set before serving.
    Store leftovers wrapped well at room temperature or in an airtight container.
    If you are using a dark, nonstick pan, heat the oven to 300 degrees.

Printable Recipe Card

About Root Beer Float Cake

Course/Dish: Cakes
Main Ingredient: Flour
Regional Style: American

Show 2 Comments & Reviews

13 Sheet Cake Recipes You Want To Slice Into

13 Sheet Cake Recipes You Want to Slice Into

Kitchen Crew @JustaPinch

Easy, delicious and a family favorite - what’s not to love about sheet cake? Check out these 13 sheet cake recipes you need to make for dessert asap!

15 Coffee Break-worthy Coffee Cake Recipes

15 Coffee Break-Worthy Coffee Cake Recipes

Kitchen Crew @JustaPinch

Acceptable as a breakfast treat or a light dessert, no one can pass up a piece of coffee cake. Brew an extra pot of coffee today, because we've found 15...

Strawberry Recipes You Need To Make This Summer

Strawberry Recipes You Need to Make This Summer

Kitchen Crew

There are many surprising health benefits of strawberries . They are loaded with Vitamin C which helps support a healthy immune system. Their anti-inflammatory and antioxidant benefits can help protect...