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Strawberry Marshmallow Brownie Bars

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These Strawberry Marshmallow Brownie Bars combine rich, fudgy brownies with a fluffy homemade strawberry marshmallow layer, creating a delightful contrast of textures and flavors. Topped with colorful sprinkles, these bars are a fun and delicious treat, perfect for parties, bake sales, or a sweet homemade dessert!

Ingredients

Units Scale

For the Brownie Base:

  • 1/2 cup unsalted butter (melted)
  • 1 cup granulated sugar
  • 2 large eggs
  • 1 tsp vanilla extract
  • 1/2 cup all-purpose flour
  • 1/4 cup cocoa powder
  • 1/4 tsp salt
  • 1/2 cup chocolate chips (optional)

For the Strawberry Marshmallow Layer:

  • 1/2 cup water (divided)
  • 1 tbsp unflavored gelatin
  • 1 cup granulated sugar
  • 1/2 cup light corn syrup
  • 1 tsp vanilla extract
  • 1/4 cup freeze-dried strawberry powder (or 1 tsp strawberry extract)
  • Pink food coloring (optional)

For Topping:

  • Colorful sprinkles

Instructions

Make the Brownie Base:

  1. Preheat Oven: Set to 350°F (175°C) and line an 8×8-inch pan with parchment paper.
  2. Mix Wet Ingredients: In a bowl, whisk together melted butter and sugar. Add eggs and vanilla, mixing well.
  3. Combine Dry Ingredients: Sift in flour, cocoa powder, and salt. Stir until just combined. Fold in chocolate chips if using.
  4. Bake: Pour the batter into the prepared pan and bake for 20-25 minutes, or until a toothpick inserted comes out with a few moist crumbs. Let cool completely.

Prepare the Strawberry Marshmallow Layer:

  1. Bloom Gelatin: In a mixing bowl, sprinkle gelatin over ¼ cup of water and let sit for 5 minutes.
  2. Make Sugar Syrup: In a saucepan, combine sugar, corn syrup, and remaining ¼ cup water. Heat over medium heat, stirring until sugar dissolves.
  3. Boil to Soft-Ball Stage: Increase heat and boil until the mixture reaches 240°F (115°C) (soft-ball stage).
  4. Whip the Marshmallow: Slowly pour the hot syrup into the gelatin while beating with an electric mixer on low. Gradually increase to high speed and beat for 8-10 minutes, until thick and fluffy.
  5. Add Flavor & Color: Mix in vanilla, strawberry powder or extract, and pink food coloring (if using).

Assemble & Chill:

  1. Layer the Marshmallow: Pour the marshmallow mixture over the cooled brownie layer, smoothing the top with a spatula.
  2. Decorate: Sprinkle with colorful sprinkles for a fun finish.
  3. Set: Let sit at room temperature for at least 4 hours (or refrigerate for quicker setting).

Slice & Enjoy!

  1. Cut into bars and serve for a fun and delicious treat!

Notes

  • Store in an airtight container at room temperature for up to 3 days.
  • Use raspberry or cherry extract for a different fruity twist!
  • For an extra chocolatey version, drizzle melted chocolate over the top before serving.