Hot Chocolate Bars take everything you love about a cozy cup of cocoa and transform it into a decadent dessert bar. Fudgy, chocolatey, and topped with gooey marshmallows, these bars are like biting into winter warmth. Whether you’re baking for the holidays, a snow day treat, or just need a comforting dessert, these bars are easy to make and guaranteed to satisfy every chocolate lover. With a soft brownie-like base and that signature hot cocoa flavor, they’re a seasonal favorite turned year-round staple.

What Makes This Recipe Special?
Hot Chocolate Bars are the ultimate fusion of brownie and hot cocoa, featuring rich cocoa powder, melted chocolate, and fluffy mini marshmallows baked right in. What sets them apart is their perfect texture—soft and gooey inside with a lightly crisp top. They’re incredibly easy to make with pantry staples and are always a hit at parties, potlucks, or just paired with a cup of coffee or milk. You don’t need to wait for winter to enjoy these comforting bars.
Cooking Time
- Prep Time: 15 minutes
- Bake Time: 25–30 minutes
- Total Time: 45 minutes
- Servings: 12 bars
Ingredients
- ½ cup unsalted butter (melted)
- ¾ cup brown sugar
- ¼ cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- ½ cup cocoa powder
- ¾ cup all-purpose flour
- ¼ teaspoon baking soda
- ¼ teaspoon salt
- ½ cup chocolate chips (semi-sweet or milk)
- 1 cup mini marshmallows
- Optional: extra chocolate chips or crushed graham crackers for topping
Instructions
1. Prepare the Oven and Pan
Preheat your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper or lightly grease it.
2. Mix the Wet Ingredients
In a mixing bowl, whisk together the melted butter, brown sugar, and granulated sugar until smooth. Add the eggs and vanilla extract, mixing well to combine.
3. Add the Dry Ingredients
Stir in the cocoa powder, flour, baking soda, and salt. Mix until just combined—don’t overmix. Fold in the chocolate chips.
4. Assemble and Bake
Pour the batter into the prepared pan and smooth the top. Bake for 20 minutes. Remove from oven and quickly sprinkle marshmallows (and extra toppings, if using) over the top. Return to the oven and bake for another 5–8 minutes, until the marshmallows are puffed and slightly golden.
Let the bars cool in the pan before slicing into squares.

Variations
- Peppermint Twist: Add ½ teaspoon peppermint extract to the batter or sprinkle crushed candy canes on top.
- Mocha Version: Add 1 teaspoon of instant coffee or espresso powder to intensify the chocolate flavor.
- S’mores Style: Add crushed graham crackers and chocolate chunks under the marshmallow topping.
- Nutty Bars: Stir in chopped walnuts or pecans for added crunch.
- Extra Fudge: Swirl in some chocolate ganache on top before adding marshmallows.
Equipment You’ll Need
- Mixing bowls
- Whisk or electric mixer
- Measuring cups and spoons
- Rubber spatula
- 8×8-inch baking pan
- Parchment paper (optional)
Nutritional Information (Per Bar)
- Calories: ~210
- Fat: 10g
- Carbohydrates: 28g
- Sugar: 20g
- Protein: 2g
Values may vary based on specific brands and portion size.
Storage Tips
- Room Temperature: Store in an airtight container for up to 3 days.
- Refrigeration: Keeps for up to a week in the fridge; reheat slightly for gooey texture.
- Freezing: Freeze individually wrapped bars for up to 2 months. Thaw at room temperature or microwave for 20 seconds to serve warm.
My Cooking Experience
With over 4 years of experience developing comfort food recipes, these Hot Chocolate Bars are one of my go-to winter bakes. The idea came from wanting to bottle up the joy of a warm drink into a bite-sized treat—and it worked better than I expected. I’ve tested this recipe in different ways, and the marshmallow topping always makes it a nostalgic hit. It’s simple, cozy, and deeply chocolatey—everything you want when it’s cold outside.
Conclusion
Hot Chocolate Bars bring all the magic of a warm mug of cocoa into dessert form. Rich, chewy, and topped with toasted marshmallows, they’re a perfect treat for chilly days or anytime you crave something sweet and satisfying. Easy to make and endlessly adaptable, they’ll quickly become a favorite in your baking rotation. Whip up a batch and enjoy the cozy vibes in every bite.

Hot Chocolate Bars
Ingredients
Method
- Preheat your oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper or lightly grease it.
- In a mixing bowl, whisk together the melted butter, brown sugar, and granulated sugar until smooth. Add the eggs and vanilla extract, mixing well to combine.
- Stir in the cocoa powder, flour, baking soda, and salt. Mix until just combined—don’t overmix. Fold in the chocolate chips.
- Pour the batter into the prepared pan and smooth the top. Bake for 20 minutes. Remove from oven and quickly sprinkle marshmallows (and extra toppings, if using) over the top. Return to the oven and bake for another 5–8 minutes, until the marshmallows are puffed and slightly golden.
- Let the bars cool in the pan before slicing into squares.
Notes
- Room Temperature: Store in an airtight container for up to 3 days.
- Refrigeration: Keeps for up to a week in the fridge; reheat slightly for gooey texture.
- Freezing: Freeze individually wrapped bars for up to 2 months. Thaw at room temperature or microwave for 20 seconds to serve warm.