Root Beer Float Brownies

Need some inspiration for a Father’s Day dessert this weekend? Or just looking for a fun dessert to take to a BBQ? Look no further because these Root Beer Float Brownies are unique and delicious! I have been making them for years and have adapted them from a recipe I found on the Cookies and Cups blog.

I recently made this for my fun collaboration with Lee’s Marketplace and have gotten some comments like, “What? Chocolate and root beer?!? That sounds weird.” Trust me, the flavor combo is perfect! The root beer in the brownie batter gives them a rich, deep flavor. They turn out so thick and fudgy! The creamy root beer frosting is so ridiculously good too. Have I ever steered you wrong? Just. Trust. Me.

Because they turn out so thick, I cut them pretty small for serving. They also freeze really well! My husband is a huge root beer fan and absolutely loves these brownies! They are the perfect Father’s Day dessert and I hope you all love them as much as my family does!

Root Beer Float Brownies

  • Servings: 24
  • Difficulty: moderate
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For the brownies:
1 1/3 cup flour
1 cup cocoa powder
1 teaspoon salt
12 oz semi sweet chocolate
6 oz white chocolate
8 tablespoons butter
1 cup white sugar
1 cup brown sugar
6 eggs
16 oz root beer
4 teaspoons vanilla

For the frosting:
1/2 cup butter, room temperature
1/3 cup root beer
5 cups powdered sugar
1/2 teaspoon root beer extract


Preheat oven to 375. Grease a 9×13 pan with baking spray.
Combine flour, cocoa powder and salt in a bowl by whisking slightly, set aside.
Add butter, semi sweet and white chocolate to a microwave safe bowl. Microwave in 20-30 second increments until melted then stir to combine, set aside.
Using a mixer, mix eggs, white sugar, brown sugar, and vanilla. Slowly add chocolate mixture.
Add the flour mixture and root beer alternately to the mixer. Mix until just combined. Pour batter into prepared pan and bake for 30-40 minutes or until center is just set. Let cool completely before frosting.

To make frosting, beat butter and 1 cup of sugar at a time on medium speed until combined. Mix in root beer (slowly) and extract and continue mixing until frosting is smooth.

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