Root Beer Float Cream Pie

Caroline Butler
Caroline Butler
Published: July 28, 2026
Categories: Pies, Dairy
Tags: Make-Ahead, Vanilla, Cream Pie, Summer Dessert, Chilled Dessert, Root Beer Float, Soda Fountain

Root Beer Float Pie

A crisp vanilla-wafer crust holds silky root beer custard under a generous layer of vanilla whipped cream for a chilled slice inspired by the soda-fountain classic.

Prep Time:30 minCook Time:25 minTotal Time:55 minServings:8Difficulty:Medium

This cream pie translates a root beer float into a clean, sliceable dessert. Root beer is reduced before it enters the custard, concentrating its caramel, wintergreen, and spice notes so they remain distinct against the dairy.

Vanilla wafers reinforce the float’s vanilla side while giving the soft filling a crisp base. The baked crust needs to cool fully before the warm custard is added, which keeps it structured instead of turning crumbly or damp.

The filling is cooked like a stovetop pudding with egg yolks and cornstarch. Whisk continuously once it begins to thicken, then let it bubble for a full minute so each chilled slice holds its shape without becoming rubbery.

Finish the pie with softly whipped vanilla cream shortly before serving. Its light texture is the final float reference and balances the darker root beer layer without needing soda, ice cream, or a drink glass.

Nutrition (per serving)

Calories:430 kcal
Protein:5 g
Carbs:52 g
Fat:23 g

Directions

  1. 1
    Root beer simmering in a wide saucepan

    Pour the flat root beer into a wide saucepan. Bring to a lively simmer over medium heat and cook for 12 to 15 minutes, until reduced to 1 cup. Set aside to cool for 10 minutes.

  2. 2
    Vanilla wafer crust pressed into a pie dish

    Heat the oven to 350°F. Stir the vanilla wafer crumbs, melted butter, and 2 tablespoons of the granulated sugar until evenly moistened. Press firmly across the bottom and up the sides of a 9-inch pie plate.

  3. 3
    Baked vanilla wafer crust cooling on a wire rack

    Bake the crust for 9 to 11 minutes, until fragrant and lightly golden at the edges. Transfer to a wire rack and cool completely.

  4. 4
    Root beer custard mixture being whisked in a saucepan

    Whisk the remaining granulated sugar, cornstarch, and salt in a medium saucepan. Gradually whisk in the whole milk, reduced root beer, and egg yolks until no dry pockets remain.

  5. 5
    Thick root beer custard bubbling around a whisk

    Cook over medium heat, whisking constantly, until the custard thickens and begins to bubble. Continue whisking for 1 minute, then remove from the heat and stir in 1 teaspoon vanilla.

  6. 6
    Root beer custard strained into the cooled pie crust

    Pour the hot custard through a fine-mesh sieve into the cooled crust and smooth the top. Press parchment directly against the filling and refrigerate for at least 5 hours, until cold and firm.

  7. 7
    Vanilla whipped cream spread over chilled root beer pie

    Beat the heavy cream, powdered sugar, and remaining 1 teaspoon vanilla in a chilled bowl until soft peaks hold their shape. Remove the parchment and spread the cream over the chilled filling in loose swirls.

  8. 8
    Cold slice of root beer float cream pie ready to serve

    Chill the finished pie for 20 minutes, then slice with a sharp knife wiped clean between cuts. Serve cold and refrigerate leftovers for up to 3 days.

Ingredients

  • Root Beer, allowed to go mostly flat:3 cups
  • Vanilla Wafer Crumbs:2 cups
  • Unsalted Butter, melted:6 tablespoons
  • Granulated Sugar, divided:2/3 cup
  • Cornstarch:1/4 cup
  • Fine Sea Salt:1/4 teaspoon
  • Whole Milk:1 1/2 cups
  • Large Egg Yolks:4
  • Pure Vanilla Extract, divided:2 teaspoons
  • Heavy Cream:1 1/2 cups
  • Powdered Sugar:3 tablespoons

Tips & Notes

  • Use a full-sugar root beer with a bold spice profile; diet soda can make the custard taste thin or leave an aftertaste.
  • A wide saucepan speeds the reduction and makes the finished root beer flavor more consistent.
  • Do not add whipped cream until the filling is fully cold, or the topping may soften and slide.