Have you ever wondered how the combination of marshmallows and peanut butter can elevate a simple brownie into a decadent dessert? If you’re a brownie lover looking to spice up your baking repertoire, then this is your moment. Marshmallow Peanut Butter Brownies are not just a treat; they’re an experience that combines rich chocolate, creamy peanut butter, and fluffy marshmallows into one irresistible bite. In this post, we’ll explore everything you need to know to create these delightful brownies, including tips, nutritional information, and common pitfalls to avoid.
Ingredients List
To create the perfect Marshmallow Peanut Butter Brownies, you’ll need the following ingredients:
- 1 cup unsalted butter (melted)
- 1 1/2 cups granulated sugar
- 1 cup packed brown sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- 1/2 teaspoon baking powder
- 1/2 teaspoon salt
- 1 cup creamy peanut butter
- 2 cups mini marshmallows
Substitution Suggestions
- Butter:Â You can substitute with coconut oil for a dairy-free option.
- Granulated Sugar:Â Coconut sugar can be used for a lower glycemic index.
- Peanut Butter:Â Almond butter or sunflower seed butter works well for nut-free versions.
- Marshmallows:Â Use vegan marshmallows to accommodate dietary restrictions.
Step-by-Step Instructions
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). This ensures that your brownies bake evenly.
Step 2: Prepare the Baking Pan
Grease a 9×13 inch baking pan with butter or line it with parchment paper for easy removal later.
Step 3: Mix Wet Ingredients
In a large mixing bowl, combine melted butter, granulated sugar, brown sugar, eggs, and vanilla extract. Whisk until the mixture is smooth and creamy.
Step 4: Combine Dry Ingredients
In a separate bowl, sift together flour, cocoa powder, baking powder, and salt. Gradually add this dry mixture to the wet ingredients, stirring until just combined.
Step 5: Add Peanut Butter
Fold in the creamy peanut butter until it’s fully incorporated, creating a rich batter.
Step 6: Pour and Spread
Pour the batter into the prepared baking pan, spreading it evenly with a spatula.
Step 7: Add Marshmallows
Sprinkle the mini marshmallows evenly over the top of the brownie batter. Press them down gently to ensure they stick during baking.
Step 8: Bake
Bake in the preheated oven for 25-30 minutes. The brownies are done when a toothpick inserted in the center comes out mostly clean, with a few moist crumbs.
Step 9: Cool and Serve
Allow the brownies to cool in the pan for at least 10 minutes before cutting them into squares. This cooling time helps the marshmallows set.

Nutritional Information
Here’s a breakdown of the nutritional content per serving (based on 16 servings):
- Calories:Â 320
- Total Fat:Â 16g
- Saturated Fat:Â 7g
- Cholesterol:Â 55mg
- Sodium:Â 180mg
- Total Carbohydrates:Â 42g
- Dietary Fiber:Â 2g
- Sugars:Â 28g
- Protein:Â 6g
This data highlights the rich, indulgent nature of these brownies, making them a perfect treat for special occasions.
Healthier Alternatives for the Recipe
If you’re looking to make these brownies a bit healthier without sacrificing flavor, consider the following substitutions:
- Use whole wheat flour instead of all-purpose flour for added fiber.
- Reduce sugar by using only granulated sugar and cutting back on the brown sugar.
- Add nuts like walnuts or pecans for extra crunch and healthy fats.
Serving Suggestions
These Marshmallow Peanut Butter Brownies are versatile and can be served in various ways:
- À la mode: Top with vanilla ice cream for a delicious contrast.
- With fruit:Â Serve alongside fresh strawberries or raspberries for a refreshing touch.
- Drizzled with chocolate sauce:Â Add an extra layer of decadence.
Common Mistakes to Avoid
- Overmixing the batter:Â This can lead to dense brownies. Mix just until combined.
- Not measuring ingredients accurately:Â Use a kitchen scale for precision.
- Skipping the cooling time:Â Cutting brownies too soon can result in a messy presentation.
Storing Tips for the Recipe
To keep your brownies fresh and delicious:
- Store in an airtight container at room temperature for up to 3 days.
- For longer storage, refrigerate for up to a week or freeze for up to 3 months.
- To reheat, simply microwave for a few seconds until warm.
Conclusion
In summary, these Marshmallow Peanut Butter Brownies are a delightful fusion of flavors and textures that are easy to make and sure to impress. With just 45 minutes of your time, you can create a dessert that will have everyone coming back for seconds. Don’t hesitate to try this recipe, and feel free to share your thoughts in the comments or leave a review. Subscribe for more delicious updates and recipes!
FAQs
Can I use crunchy peanut butter instead of creamy?
Yes, crunchy peanut butter will add a delightful texture to your brownies.
How can I make these brownies gluten-free?
Substitute all-purpose flour with a gluten-free flour blend, ensuring it’s suitable for baking.
What’s the best way to cut brownies?
Use a sharp knife and wipe it clean between cuts for neat squares.

Marshmallow Peanut Butter Brownies
Ingredients
- 1 cup unsalted butter
- 1 1/2 cups granulated sugar
- 1 cup packed brown sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- 1/2 teaspoon baking powder
- 1/2 teaspoon salt
- 1 cup creamy peanut butter
- 2 cups mini marshmallows
Instructions
- Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.
- Mix Wet Ingredients:Â In a large bowl, combine melted butter, granulated sugar, brown sugar, eggs, and vanilla extract. Mix until smooth.
- Combine Dry Ingredients:Â In another bowl, sift together flour, cocoa powder, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, stirring until well combined.
- Add Peanut Butter:Â Fold in the creamy peanut butter until fully incorporated into the batter.
- Pour and Add Marshmallows:Â Pour the batter into the prepared pan, spreading it evenly. Sprinkle mini marshmallows on top.
- Bake:Â Bake for 25-30 minutes, or until a toothpick inserted comes out mostly clean.
- Cool and Serve:Â Allow to cool for about 10 minutes before cutting into squares.
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