Cornflake Chocolate Marshmallow Bars Recipe
Introduction
Cornflake Chocolate Marshmallow Bars are a delightful treat combining crunchy cereal, gooey marshmallows, and rich chocolate. These bars are perfect for satisfying your sweet tooth with a satisfying texture and homemade charm.

Ingredients
- 4 cups cornflake cereal, roughly crushed
- ⅓ cup powdered milk
- 2 tablespoons granulated sugar
- 1 teaspoon kosher salt
- ½ cup (1 stick / 113 g) unsalted butter, melted
- 1 cup (2 sticks / 227 g) unsalted butter, softened
- 1¼ cups (250 g) granulated sugar
- ⅔ cup (133 g) brown sugar
- 1 large egg, room temperature
- ½ teaspoon vanilla
- 1½ cups (187.5 g) all-purpose flour, plus 2 tablespoons
- 1 cup (127 g) bread flour
- ½ teaspoon baking soda
- ½ teaspoon baking powder
- 1½ teaspoons kosher salt
- 2 cups mini marshmallows
- 5 chocolate Hershey bars (1.55 ounces each)
Instructions
- Step 1: Preheat oven to 275°F and line a baking sheet with parchment paper.
- Step 2: In a medium bowl, combine crushed cornflakes, powdered milk, granulated sugar, and 1 teaspoon kosher salt. Toss to mix well.
- Step 3: Pour in melted butter and toss again to coat the cornflakes, forming small clusters.
- Step 4: Spread the mixture evenly on the prepared baking sheet and bake for 20 minutes, or until the cereal is lightly toasted.
- Step 5: Remove from oven and cool completely. Break any large clusters into smaller bits.
- Step 6: Preheat oven to 350°F and spray a 9×13-inch pan with nonstick cooking spray.
- Step 7: In a stand mixer bowl, beat softened butter with granulated and brown sugars on medium speed until creamy, about 2 minutes.
- Step 8: Add the egg and vanilla extract, then continue beating for 8 minutes to aerate the dough.
- Step 9: Add all-purpose flour, bread flour, baking soda, baking powder, and 1½ teaspoons kosher salt. Mix on low speed just until incorporated.
- Step 10: Gently fold in the cooled cornflake crunch mixture.
- Step 11: Divide the dough in half. Press half of it evenly into the bottom of the prepared pan.
- Step 12: Arrange the Hershey bars and mini marshmallows over the dough layer.
- Step 13: Spread the remaining dough over the top, pressing evenly to the edges.
- Step 14: Bake for 25 to 30 minutes, or until the bars are golden brown.
- Step 15: Allow bars to cool completely before slicing and serving.
Tips & Variations
- For extra gooey bars, add an additional ½ cup of mini marshmallows in the middle layer.
- Substitute dark chocolate bars if you prefer a richer flavor.
- Use gluten-free flour blends to make this recipe gluten-free.
- Use salted butter and reduce added salt for a less salty result.
Storage
Store bars in an airtight container at room temperature for up to 5 days. For longer storage, refrigerate for up to 1 week. Reheat briefly in the microwave to soften the marshmallows before serving, if desired.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use regular marshmallows instead of mini marshmallows?
Yes, regular marshmallows can be chopped into smaller pieces and used as a substitute. Mini marshmallows, however, melt more evenly and create a better texture.
Can I make the cornflake crunch ahead of time?
Absolutely. The cornflake crunch can be prepared a day ahead and stored in an airtight container until you are ready to fold it into the dough.
PrintCornflake Chocolate Marshmallow Bars Recipe
Delight in these Cornflake Chocolate Marshmallow Bars, a perfect blend of crunchy toasted cornflakes, luscious chocolate, and gooey marshmallows baked into a chewy, flavorful dessert bar. The recipe combines a buttery, aerated dough with toasted cornflake clusters and layers of Hershey chocolate and mini marshmallows that melt beautifully in the oven. Ideal for an indulgent treat or sharing at gatherings.
- Prep Time: 20 minutes
- Cook Time: 50 minutes
- Total Time: 1 hour 10 minutes
- Yield: 12 bars 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
Cornflake Crunch
- 4 cups cornflake cereal, roughly crushed
- ⅓ cup powdered milk
- 2 tablespoons granulated sugar
- 1 teaspoon kosher salt
- ½ cup (1 stick / 113 g) unsalted butter, melted
Bar Batter
- 1 cup (2 sticks / 227 g) unsalted butter, softened
- 1¼ cups (250 g) granulated sugar
- ⅔ cup (133 g) brown sugar
- 1 large egg, room temperature
- ½ teaspoon vanilla extract
- 1½ cups (187.5 g) all-purpose flour
- 2 tablespoons all-purpose flour (additional)
- 1 cup (127 g) bread flour
- ½ teaspoon baking soda
- ½ teaspoon baking powder
- 1½ teaspoons kosher salt
Toppings
- 2 cups mini marshmallows
- 5 Hershey bars (1.55 ounces each)
Instructions
- Preheat and prepare cornflake crunch: Preheat your oven to 275°F (135°C) and line a baking sheet with parchment paper to prevent sticking.
- Combine dry ingredients for crunch: In a medium bowl, add the roughly crushed cornflakes, powdered milk, 2 tablespoons granulated sugar, and 1 teaspoon kosher salt. Toss everything together evenly.
- Add melted butter to crunch mixture: Pour ½ cup melted unsalted butter over the dry mixture and toss thoroughly until small cornflake clusters begin to form.
- Bake the cornflake crunch: Spread the mixture evenly on the prepared baking sheet and bake for 20 minutes, or until the cereal is slightly toasted and golden brown.
- Cool and break into clusters: Remove from oven and let the clusters cool completely. Once cool, break apart any large clumps into smaller bits for folding into the batter.
- Preheat and prepare baking pan for bars: Increase oven temperature to 350°F (175°C) and spray a 9×13-inch pan with nonstick cooking spray to prepare for the batter.
- Cream butter and sugars: In the bowl of a stand mixer, combine 1 cup softened butter with granulated sugar and brown sugar. Beat on medium speed until creamy and well blended, about 2 minutes.
- Add egg and vanilla: Add the room temperature egg and ½ teaspoon vanilla extract to the mixer and continue beating for 8 minutes. This step aerates the dough to improve texture.
- Incorporate dry ingredients: Add 1½ cups plus 2 tablespoons all-purpose flour, 1 cup bread flour, ½ teaspoon baking soda, ½ teaspoon baking powder, and 1½ teaspoons kosher salt to the mixture. Mix on low speed until just combined; avoid overmixing.
- Fold in cornflake crunch: Gently fold in the cooled cornflake crunch clusters into the batter to evenly distribute the crunchiness throughout.
- Press half dough into pan: Divide the dough in half. Press half of the dough evenly into the bottom of the prepared 9×13-inch pan as the base layer.
- Add chocolate and marshmallows: Break the 5 Hershey bars into pieces and spread them evenly on top of the dough layer. Then sprinkle 2 cups mini marshmallows evenly over the chocolate pieces.
- Top with remaining dough: Press the remaining half of the dough evenly over the marshmallow and chocolate layer, covering completely to the edges.
- Bake the assembled bars: Place the pan in the preheated oven and bake for 25 to 30 minutes, or until the top is golden brown and the bars are set.
- Cool before serving: Remove the bars from the oven and allow them to cool completely in the pan before slicing and serving to ensure they hold together well.
Notes
- Beating the egg and vanilla for 8 minutes is crucial to aerate the dough, resulting in a better texture.
- Using a mix of all-purpose and bread flour adds the right balance of tenderness and chewiness to the bars.
- Allow the cornflake clusters to cool fully before folding them in to maintain their crunchiness.
- If you prefer, substitute Hershey bars with your favorite chocolate bars for different flavor profiles.
- Ensure the bars are fully cooled before cutting to avoid them falling apart.
Keywords: cornflake bars, chocolate marshmallow bars, crunchy dessert bars, easy baked bars, Hershey chocolate bars recipe

