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root beer float cookies on the counter next to a root beer float
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5 from 2 votes

Frosted Root Beer Float Cookies

A perfectly chewy root beer flavored cookie topped with a vanilla marshmallow cream frosting. This perfect combination creates the the absolute best root beer float in cookie form! 
Course desesrt
Cuisine amercian
Keyword root beer float cookies
Prep Time 20 minutes
Cook Time 15 minutes
Cooling time 30 minutes
Servings 24 servings (1/2 cookie per serving)
Calories 372kcal
Author Karli Bitner


Root Beer Cookie

  • 1 1/2 cups salted butter softened
  • 1 1/2 cups granulated sugar
  • 3 eggs
  • 2 1/2 tsp root beer flavoring I use Lorann's brand
  • 2 tbsp canola oil
  • 4 1/2 cups all purpose flour
  • 3 tsp baking powder

Marshmallow Frosting

  • 1/2 cup butter
  • 3 cups powdered sugar
  • 7 oz marshmallow creme
  • milk as needed for consistency


  • Preheat the oven to 350°.
  • In the bowl of a stand mixer cream together the butter and sugar until light and fluffy.
  • Scrape the sides of the bowl and add the eggs, root beer flavoring and oil.
  • Mix until combined.Lastly, add in the flour and baking powder. Mix until the dough forms. The dough will be soft.
  • Scoop your dough out into generous 1/3 cup portions. Roll the cookie dough into a ball and then flatten the cookie dough slightly. Repeat with the remaining dough, arrange on pan.
  • Bake at 350° for 11-14 minutes. The cookies will spread slightly and the centers will puff up when they are ready to be taken out of the oven. Allow the cookies to cool on the pan.
  • Make the frosting, by whipping the butter until smooth.
  • Add the powdered sugar, one cup at a time, adding a little bit of milk after each cup of powdered sugar to keep the consistency like a thick frosting.
  • Add the marshmallow creme to the frosting and mix until well combined.
  • Divide the frosting among the cookies and spread to cover the top of the cookie.
  • Serve chilled.


Calories: 372kcal | Carbohydrates: 53g | Protein: 3g | Fat: 17g | Saturated Fat: 10g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Trans Fat: 1g | Cholesterol: 61mg | Sodium: 131mg | Potassium: 88mg | Fiber: 1g | Sugar: 32g | Vitamin A: 502IU | Calcium: 33mg | Iron: 1mg