
Remember those magical summer days spent sipping on ice-cold root beer floats? This recipe captures that same delicious, bubbly magic in the form of incredibly easy-to-make cupcakes. Get ready for a taste of nostalgia that’ll have everyone asking for seconds!
Why You’ll Love This Recipe
- Fast – Ready in under 30 minutes (plus cooling time).
- Easy – Uses a cake mix for simple preparation.
- Giftable – Perfect for birthdays, holidays, or just because!
- Crowd-pleasing – A fun and unique flavor everyone will adore.
Ingredients
Cupcakes:
- 1 box vanilla cake mix (I prefer a good quality one for the best flavor!)
- 1 cup root beer soda (Don’t use diet – the sugar is key to the flavor!)
- 2 large eggs
- 1 teaspoon root beer extract or vanilla extract (optional, but adds a nice boost!)
Frosting:
- 1 cup unsalted butter, softened (Make sure it’s really soft for easy beating!)
- 2½ cups powdered sugar
- 2–3 tablespoons heavy cream or milk (Start with 2 and add more for desired consistency)
- 1 teaspoon vanilla extract
- ¼–½ teaspoon root beer extract (optional, for extra root beer punch!)
Garnish:
- Maraschino cherries
- Mini straws or crushed root beer candies (optional, but adds a fun touch!)
How to Make It
- Preheat your oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners. This makes it super easy to remove the cupcakes later.
- In a large bowl, combine the cake mix, root beer soda, eggs, and extract (if using). Beat on medium speed for about 2 minutes, until everything is well combined. Don’t overmix!
- Fill each cupcake liner about ⅔ full with batter. I like to use a cookie scoop for even distribution.
- Bake for 18–20 minutes, or until a toothpick inserted into the center comes out clean. Every oven is different, so keep an eye on them!
- Let the cupcakes cool completely in the pan before frosting. This prevents the frosting from melting.
- While the cupcakes cool, make the frosting! Beat the softened butter until it’s light and fluffy. Gradually add the powdered sugar, then the vanilla and root beer extract (if using). Add the cream or milk, one tablespoon at a time, until you reach your desired consistency.
- Once the cupcakes are completely cool, frost them generously. Get creative! I like to use a piping bag, but a knife works just fine too.
- Garnish with a maraschino cherry and a mini straw (or crushed root beer candies) and you’re ready to enjoy!

Substitutions & Additions
Feeling adventurous? Try substituting the vanilla cake mix with chocolate for a mocha root beer cupcake. You could also add chocolate chips to the batter for an extra layer of deliciousness! For a more intense root beer flavor, increase the extract.
Tips for Success
- Don’t overmix the batter – it can lead to tough cupcakes.
- Make sure your butter is softened but not melted for the frosting – room temperature is perfect.
- Let the cupcakes cool completely before frosting to prevent melting.
- Prep ahead! You can bake the cupcakes a day or two in advance and frost them right before serving.
How to Store It
Store frosted cupcakes in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to a week. They freeze well too – just wrap them individually in plastic wrap before storing them in a freezer-safe bag or container for up to 2 months.
FAQs
- Q: Can I use diet root beer? A: I wouldn’t recommend it. The sugar in the regular root beer contributes significantly to the flavor and texture of the cupcakes.
- Q: What if my cupcakes are done baking but still a little moist? A: They might need a few more minutes in the oven. Check them every minute or two until a toothpick inserted into the center comes out clean.
- Q: Can I make the frosting ahead of time? A: Yes! The frosting can be made a day or two in advance and stored in an airtight container in the refrigerator. Let it come to room temperature before frosting the cupcakes.
- Q: Can I use a different type of extract? A: While root beer extract is recommended for the best flavor, you could substitute with another extract like vanilla or even almond, but the overall flavor profile will change.

Root Beer Float Cupcakes
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners.
- In a large bowl, combine the cake mix, root beer soda, eggs, and extract (if using). Beat on medium speed for about 2 minutes, until everything is well combined. Don't overmix!
- Fill each cupcake liner about ⅔ full with batter.
- Bake for 18–20 minutes, or until a toothpick inserted into the center comes out clean.
- Let the cupcakes cool completely in the pan before frosting.
- While the cupcakes cool, make the frosting! Beat the softened butter until it's light and fluffy. Gradually add the powdered sugar, then the vanilla and root beer extract (if using). Add the cream or milk, one tablespoon at a time, until you reach your desired consistency.
- Once the cupcakes are completely cool, frost them generously.
- Garnish with a maraschino cherry and a mini straw (or crushed root beer candies) and you’re ready to enjoy!





