This dreamy root beer float poke cake brings all the fizzy, creamy magic of a classic soda fountain treat straight to your kitchen — no straws required. Every bite delivers that bold, slightly spiced root beer flavor woven right into the tender cake layers and the luscious sweetened milk soak.
The whipped cream topping and cherry finish seal the deal on this retro-inspired showstopper. Oh, and yes — it starts with a box mix, because shortcuts are a baker’s best friend.
Table of Contents
Why We Love This Root Beer Float Poke Cake
- Deep, authentic root beer flavor — The soda reduction concentrates every note of that classic root beer taste into a rich, syrupy soak that seeps straight into the cake
- Incredibly moist texture — The poke-and-pour method ensures every forkful is saturated with the condensed milk mixture, so there are zero dry bites
- Box mix made brilliant — A white cake mix is your secret weapon here; it saves time without sacrificing any of the wow factor
- Stunning presentation — Topped with clouds of homemade whipped cream and ruby maraschino cherries, this cake looks like it came straight from a 1950s diner
- Crowd-pleaser energy — It feeds a full 9×13 pan and can be made ahead, making it perfect for potlucks, birthdays, or any gathering where you want to be remembered
Ingredients:
- Baking spray with flour
- 1 (15.25 oz) package white cake mix
- 3 large eggs
- ½ cup neutral oil (canola or vegetable both work great)
- 2 teaspoons root beer extract (optional but recommended)
- 4 cups root beer, divided
- 1 (14 oz) can sweetened condensed milk
- 1½ cups heavy cream
- 2 tablespoons confectioners’ sugar
- 12 whole maraschino cherries
Step-By-Step Direction
Step 1: Preheat your oven to 350°F (180°C). Lightly coat a 13×9-inch baking dish with baking spray and set it aside. In a large mixing bowl, whisk together the cake mix, eggs, oil, vanilla extract (if using), and 1 cup of root beer until the batter is smooth. Pour the batter into the prepared pan and spread it into an even layer.
Step 2: Bake for 28 to 32 minutes, or until a toothpick inserted into the center comes out clean. Remove the cake from the oven and let it rest while you prepare the topping.
Step 3: While the cake bakes, pour the remaining 3 cups of root beer into a saucepan and bring it to a boil over medium-high heat. Reduce the heat to medium and let it simmer, stirring occasionally, until it reduces to about ¾ cup and becomes slightly syrupy, about 30 minutes. Transfer ½ cup of the reduced root beer to a medium bowl and reserve the remaining ¼ cup for serving. Whisk the sweetened condensed milk into the ½ cup of reduced root beer until fully combined.
Step 4: While the cake is still warm, use the handle of a wooden spoon to poke holes all over the surface, spacing them about 1½ inches apart. Slowly pour the root beer and condensed milk mixture over the cake, spreading it evenly with a spatula so it seeps into the holes. Let the cake cool completely at room temperature for about 1 hour.
Step 5: In a large bowl, beat the heavy cream and powdered sugar with an electric mixer on medium-high speed until stiff peaks form, about 2 to 3 minutes. Spread the whipped cream evenly over the cooled cake, then top with maraschino cherries. Drizzle each serving with the reserved reduced root beer, if desired.
Tips for The Best Results
Chill your bowl and beaters before whipping the cream — cold equipment helps the cream whip up faster and hold its shape longer
Don’t rush the reduction — simmering the root beer low and slow is what builds that deep, concentrated flavor; cranking the heat will just burn it
Use the wooden spoon handle trick properly — the thicker the holes, the more of that incredible soak seeps all the way through the cake layers
Extract = more punch — the root beer extract is technically optional, but it elevates the flavor significantly if you want that bold soda shop taste to come through clearly
Make it the night before — this cake actually gets better as it sits; the soak continues to meld overnight in the fridge, making it even more tender and flavorful by the next day
Pat the cherries dry before placing them on the whipped cream so they don’t bleed color into the topping
Storage
Cover the cake tightly with plastic wrap or store it in an airtight container in the refrigerator for up to 4 days. The whipped cream topping holds up well chilled, though it’s best enjoyed within the first 2 days for peak texture. This cake is not ideal for freezing once assembled, as the whipped cream topping doesn’t thaw well — but you can freeze the plain baked and soaked cake (without the topping) for up to 1 month. Thaw overnight in the fridge and add fresh whipped cream before serving.
Root Beer Float Poke Cake
Instructions
- Step 1 — Prep and Mix the Batter: Heat your oven to 350°F (180°C). Generously coat a 9×13-inch baking pan with flour-based baking spray and set it aside. In a large bowl, whisk together the cake mix, eggs, oil, root beer extract if using, and 1 cup of root beer until smooth. Pour the batter into the prepared pan and spread evenly.
- Step 2 — Bake: Bake for 28 to 32 minutes, or until a toothpick inserted into the center comes out clean.
- Step 3 — Make the Root Beer Soak: While the cake bakes, pour the remaining 3 cups of root beer into a saucepan over medium-high heat and bring to a boil. Reduce heat to medium and simmer, stirring occasionally, until slightly thickened and reduced to about ¾ cup — roughly 30 minutes. Pour ½ cup of the reduction into a medium bowl and reserve the remaining ¼ cup for serving. Whisk the condensed milk into the ½ cup of root beer reduction until fully combined.
- Step 4 — Poke and Soak: While the cake is still warm, use the blunt handle end of a wooden spoon to poke holes all over the surface about 1½ inches apart. Slowly pour the condensed milk mixture over the top, using a spatula to spread it evenly into every hole. Allow the cake to cool completely to room temperature, about 1 hour.
- Step 5 — Top and Serve: Beat the heavy cream and confectioners’ sugar in a large bowl with an electric mixer on medium-high speed until stiff peaks form, about 2 to 3 minutes. Spread evenly over the cooled cake and garnish with maraschino cherries. Serve with the reserved root beer reduction drizzled on top or on the side.
Notes
- Chill your mixing bowl and beaters before whipping the cream for the best, most stable results.
- Don’t rush the root beer reduction — low and slow builds the deepest flavor.
- The root beer extract is optional, but it significantly boosts that classic soda shop taste.
- This cake gets even better overnight as the soak continues to work through the layers.
- Pat maraschino cherries dry before placing them on the whipped cream so they don’t bleed color.
- Store covered in the refrigerator for up to 4 days. For best texture, add the whipped cream topping the day you plan to serve.
Nutrition Facts
- Calories: 521
- Total Carbohydrate: 66g
- Dietary Fiber: 1g
- Total Sugars: 52g
- Protein: 7g
- Total Fat: 26g
- Saturated Fat: 11g
- Cholesterol: 95mg
- Vitamin C: 2mg
- Sodium: 351mg
- Calcium: 233mg
- Iron: 1mg
- Potassium: 247mg
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| Equipment | Amazon Links |
| 9×13-inch baking pan | Shop On Amazon |
| Large mixing bowl | Shop On Amazon |
| Electric hand mixer or stand mixer | Shop On Amazon |
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