There’s something truly magical about the combination of chocolate and peanut butter. It’s an iconic duo that has a special place in the hearts of dessert lovers everywhere. Today, we are diving into a recipe that takes this beloved pairing to a whole new level: Peanut Butter Krispie Brownies. These treats are not your average brownies; they are a decadent fusion of fudgy brownie goodness, gooey marshmallow, and crunchy Rice Krispies, all held together with creamy peanut butter. Whether you’re sharing them with friends or keeping them all to yourself, these brownies are sure to impress.
Why This Recipe Belongs in Your Rotation

Every dessert lover needs a go-to recipe that’s simple yet indulgent, and Peanut Butter Krispie Brownies fit the bill perfectly. They are easy to whip up, require minimal ingredients, and are a guaranteed crowd-pleaser. Plus, the layers of textures—from the chewy brownie base to the crispy topping—make every bite an exciting experience. On top of that, they store well, meaning you can enjoy them throughout the week.
The Ingredient Lineup
To create these delicious Peanut Butter Krispie Brownies, you will need the following ingredients:
- 1 (18-oz) package brownie mix
- Ingredients to make cake-like brownies (usually requires eggs, oil, and water; follow package instructions)
- 1 (7-oz) jar marshmallow creme
- 1 cup creamy peanut butter
- 1 (12-oz) package semi-sweet chocolate chips
- 4 cups Rice Krispie cereal
These ingredients are not only easy to find but also work harmoniously together to create a dessert that’s both rich and satisfying.
Toolbox for This Recipe
Before getting started, gather these essential tools:
- Mixing bowls – for combining your brownie batter and toppings.
- 9×13-inch baking pan – the perfect size for baking your brownies.
- Rubber spatula – ideal for mixing and spreading the ingredients.
- Measuring cups and spoons – to ensure accurate ingredient measurements.
- Microwave-safe bowl – for melting the chocolate and peanut butter mixture.
With these tools in hand, you’re ready to create something truly special.
Mastering Peanut Butter Krispie Brownies: How-To

Let’s break down the steps to make these scrumptious Peanut Butter Krispie Brownies:
Step 1: Preheat Your Oven
Preheat your oven to 350°F (175°C). This ensures that your brownies will bake evenly.
Step 2: Prepare the Brownie Base
In a large mixing bowl, prepare the brownie mix according to the package instructions. Typically, this involves combining the mix with eggs, oil, and water. Stir until just combined, being careful not to overmix. Pour the brownie batter into a greased 9×13-inch baking pan and spread it evenly.
Step 3: Bake the Brownies
Place the pan in the preheated oven and bake for 20-25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Remove the brownies from the oven and let them cool in the pan.
Step 4: Make the Peanut Butter Layer
While the brownies cool, it’s time to prepare the peanut butter layer. In a microwave-safe bowl, combine the creamy peanut butter and marshmallow creme. Microwave for 30 seconds, then stir until smooth. If needed, microwave for an additional 10-15 seconds to achieve a creamy consistency.
Step 5: Assemble the Layers
Once the brownies have cooled completely, spread the peanut butter and marshmallow mixture over the top of the brownie base, smoothing it out with a spatula.
Step 6: Prepare the Krispie Topping
In a separate bowl, combine the Rice Krispie cereal and semi-sweet chocolate chips. Pour the melted peanut butter mixture over the cereal and chocolate chips, and stir until everything is coated evenly.
Step 7: Top the Brownies
Carefully spoon the Krispie mixture over the peanut butter layer, pressing it down gently to create an even topping.
Step 8: Chill and Serve
Refrigerate the assembled brownies for at least 30 minutes to allow the layers to set. Once chilled, cut into squares and enjoy your Peanut Butter Krispie Brownies!
Ingredient Swaps & Substitutions

If you’re looking to customize these Peanut Butter Krispie Brownies, consider these substitutions:
- Brownie mix: You can use a homemade brownie recipe if you prefer.
- Marshmallow creme: Substitute with melted marshmallows if you can’t find creme.
- Creamy peanut butter: Chunky peanut butter works well for added texture.
- Chocolate chips: Use dark chocolate or white chocolate chips for a different flavor.
Feel free to experiment and make these brownies your own!
Pitfalls & How to Prevent Them
While making Peanut Butter Krispie Brownies is fairly straightforward, here are some common pitfalls to avoid:
- Overbaking the brownies: Keep an eye on them and use the toothpick test to ensure they’re perfectly baked.
- Uneven layers: Make sure to spread the peanut butter layer evenly for balanced flavor in every bite.
- Sticky topping: If the Krispie layer is too sticky, try adding a touch more Rice Krispies or chilling them longer.
By following these tips, your brownies will turn out beautifully every time.
Make Ahead Like a Pro
Want to prepare your Peanut Butter Krispie Brownies in advance? Here’s how:
- Make the brownies and peanut butter layer a day ahead, then assemble them just before serving.
- Store the assembled brownies in an airtight container in the refrigerator for up to one week.
- If freezing, wrap them tightly in plastic wrap and store them in a freezer-safe container for up to three months. Thaw in the fridge before serving.
These make-ahead tips will make entertaining or meal prep a breeze!
Common Questions
Can I use a different type of cereal?
Absolutely! While Rice Krispies provide a classic crunch, you can experiment with other cereals such as Cornflakes or even granola for a different texture.
What if I want to make these brownies gluten-free?
You can easily make Peanut Butter Krispie Brownies gluten-free by using a gluten-free brownie mix and ensuring that your cereal is also gluten-free.
Can I add nuts to the recipe?
Yes! Chopped nuts such as peanuts or walnuts can be added to the brownie batter or sprinkled on top for extra crunch and flavor.
How do I store leftovers?
Store leftover brownies in an airtight container at room temperature for up to three days, or in the refrigerator for up to a week.
Weekend Projects
If you love Peanut Butter Krispie Brownies, check out these other delicious weekend projects:
- Creamy Peanut Butter Pie With Chocolate Crust
- Milky Way Cheesecake Brownies
- Fudgy Brownie Ice Cream Sandwiches
These recipes will keep your baking enthusiasm alive and provide plenty of sweet options to share with family and friends.
Ready to Cook?
Now that you have all the tips and tricks for making the ultimate Peanut Butter Krispie Brownies, it’s time to gather your ingredients and get baking. These brownies are not just a treat; they’re a celebration of flavors and textures that everyone will love. Whether it’s a special occasion or just a casual weekend dessert, these brownies are sure to brighten your day and satisfy your sweet tooth. Happy baking!

Peanut Butter Krispie Brownies
Ingredients
- 1 package brownie mix (18-oz)
- 1 jar marshmallow creme (7-oz)
- 1 cup creamy peanut butter
- 1 package semi-sweet chocolate chips (12-oz)
- 4 cups Rice Krispie cereal
- 3 ingredients ingredients to make cake-like brownies (usually requires eggs, oil, and water; follow package instructions)
Instructions
- Preheat your oven to 350°F (175°C).
- In a large mixing bowl, prepare the brownie mix according to the package instructions.
- Pour the brownie batter into a greased 9x13-inch baking pan and spread it evenly.
- Bake for 20-25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
- Let the brownies cool in the pan.
- In a microwave-safe bowl, combine the creamy peanut butter and marshmallow creme. Microwave for 30 seconds, then stir until smooth.
- Spread the peanut butter and marshmallow mixture over the top of the cooled brownie base.
- In a separate bowl, combine the Rice Krispie cereal and semi-sweet chocolate chips.
- Pour the melted peanut butter mixture over the cereal and chocolate chips, and stir until everything is coated evenly.
- Carefully spoon the Krispie mixture over the peanut butter layer, pressing it down gently.
- Refrigerate for at least 30 minutes to allow the layers to set.
- Cut into squares and enjoy!
Equipment
- Mixing bowls
- 9x13 inch Baking Pan
- Rubber spatula
- Measuring cups and spoons
- Microwave-safe Bowl
Notes
- Store leftovers in an airtight container for up to a week.
- For a gluten-free version, use gluten-free brownie mix and cereal.
- Experiment with different types of chocolate chips for variety.
