Save A decadent fusion dessert combining fudgy brownies, toasted marshmallows, and a creamy root beer float twist, these S’mores Soda Float Brownies are perfect for indulging your sweet tooth with a nostalgic campfire flair.
I first made these S’mores Soda Float Brownies for a summer gathering, and they were an instant hit. The combination of gooey marshmallows and cold ice cream with the rich brownie base instantly brought back fond memories of campfires and root beer floats with friends.
Ingredients
- Brownie Layer: 1/2 cup (115 g) unsalted butter, melted; 1 cup (200 g) granulated sugar; 2 large eggs; 1 tsp vanilla extract; 1/3 cup (40 g) unsweetened cocoa powder; 1/2 cup (65 g) all-purpose flour; 1/4 tsp salt; 1/4 tsp baking powder
- Graham Cracker Base: 1 cup (100 g) graham cracker crumbs; 1/4 cup (60 g) unsalted butter, melted; 2 tbsp sugar
- Marshmallow & Float Topping: 1 1/2 cups (75 g) mini marshmallows; 1 cup (240 ml) vanilla ice cream, slightly softened; 1/2 cup (120 ml) root beer or cola; 2 oz (55 g) milk chocolate, chopped or chips
Instructions
- Prepare the pan:
- Preheat oven to 350°F (175°C). Line an 8x8-inch (20x20 cm) baking pan with parchment paper, leaving an overhang for easy removal.
- Graham cracker crust:
- In a small bowl, combine graham cracker crumbs, melted butter, and sugar. Press evenly into the bottom of the prepared pan to form a crust.
- Brownie batter:
- In a medium bowl, mix melted butter and sugar. Whisk in eggs and vanilla until smooth.
- Combine dry ingredients:
- Sift in cocoa powder, flour, salt, and baking powder. Stir until just combined.
- Layer and bake:
- Pour brownie batter over the graham cracker base and smooth the top. Bake for 28–32 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
- Marshmallow topping:
- Remove pan from oven and immediately sprinkle mini marshmallows evenly over the brownies. Return to oven for 3–4 minutes, until marshmallows are puffed and golden.
- Cool and finish:
- Remove brownies and cool completely in the pan. Once cooled, drizzle melted chocolate over the marshmallow layer. Chill until set.
- Serve:
- Just before serving, cut into squares. Top each brownie with a scoop of vanilla ice cream and pour over a splash of root beer or cola to create a float effect. Serve immediately.
Save Making these brownies with my family always turns into a fun kitchen adventure—everyone gets excited to add their favorite soda and build their own float. It’s a treat that brings smiles and lots of laughter around the table.
Required Tools
8x8-inch (20x20 cm) baking pan, mixing bowls, whisk, spatula, parchment paper, small saucepan or microwave (for melting chocolate), ice cream scoop.
Nutritional Information
Per serving: 320 calories, 15 g total fat, 45 g carbohydrates, 3 g protein.
Notes
For a richer flavor, use dark chocolate chips for the topping. Substitute cola for root beer if preferred. Use a kitchen torch for extra-toasty marshmallows. Serve brownies at room temperature or slightly chilled before topping with ice cream and soda.
Save Enjoy these brownies warm or cold for a fun twist on two favorites. Serve immediately for the full float experience!
Recipe FAQs
- → How do I ensure the brownies are fudgy?
Bake until a toothpick comes out with a few moist crumbs—avoid overbaking for best texture.
- → Can I substitute root beer with another soda?
Yes, cola is a perfect substitute and adds a different twist to the float topping.
- → How do I achieve extra-toasty marshmallows?
Use a kitchen torch after baking to toast marshmallows further for added flavor and texture.
- → What's the benefit of adding graham cracker crumbs?
The base brings s’mores-inspired crunch and a subtle, sweet flavor to complement the chocolate.
- → Is it possible to make this dessert in advance?
You can prepare the brownies and marshmallow topping ahead, but add ice cream and soda right before serving.
- → How should leftovers be stored?
Store brownies in an airtight container at room temperature or refrigerated before topping with ice cream.