These peanut butter cup Rice Krispies treats take the classic treat to a totally new level. Loaded with delicious Reese's Pieces and Peanut Butter cups, these treats are peanut butter and chocolate lover's dream.
There are two sweet treats that I really love - peanut butter cups and Rice Krispies treats. So I thought it would be a great idea to put them together. Guess what? I was right!

Reese's Rice Krispies Treats
This was inspired by my other Rice Krispies treats recipe on this site. My peanut butter chocolate squares are full of chocolate, peanut butter, and Rice Krispies, so I knew this idea would work really well.
Ingredients
It only takes six ingredients to make these delicious Reese's Peanut Butter Cup Stuffed Rice Krispie Treats treats. A quick trip down two aisles in the store, and you'll be ready to make these tasty squares.
- Rice Krispies cereal
- Mini marshmallows
- Creamy peanut butter
- Butter
- Reese's Pieces
- Reese's Peanut Butter Cups
See the recipe card at the end of the post for quantities and cooking times.
Instructions
Making these delicious peanut butter rice krispies treats is just as easy as shopping for the ingredients. In just a few easy steps and a few minutes, you'll be all done!
Step 1: Prep
Grease a 9x13 baking pan with butter or spray with non-stick cooking spray.
Step 2: Combine Cereal and Reese's Pieces
In a large mixing bowl, combine the cereal and Reese's Pieces and mix well.
Step 3: Make the Marshmallow Mixture
Add butter and marshmallows to a saucepan and heat over medium-low heat until melted, stirring often. Once the mixture is melted, add the peanut butter.
Step 4: Mix the Cereal and Marshmallow
Pour the marshmallow and peanut butter mixture over the cereal mix and stir to combine.
Step 5: Add to the Baking Pan
Spoon the Rice Krispies treats mixture into the baking pan and spread it evenly.
Step 6: Add the Peanut Butter Cups and More Reese's Pieces
Place the peanut butter cups on top of the mixture in rows of three and press them into the mix firmly. Add more Reese's Pieces and press those firmly into the mixture, as well.
Step 7: Let it Set
Let the mix set for at least two hours, then cut into 18 equal squares.
Hint: Be sure to pour the melted marshmallow mixture onto the cereal mixture immediately so it's easier to mix.

Substitutions
Don't have the correct ingredients on hand? Here are some helpful tips for you to change this Reese's Rice Krispies treats recipe.
- Alternate Candies - I love the flavor of Reese's the best, but you can use any generic peanut butter cups and peanut butter candies you happen to have on hand.
- Generic Cereal - You can use any generic crisp rice cereal to make this recipe.
- Marshmallows - If you don't have mini marshmallows, you can melt full size marshmallows. Just be sure to mix often to prevent scorching.
Variations
Want to personalize this peanut butter cup Rice Krispies treats recipe? Here are some of my tried and true tips for changing up this recipe.
- Pretzel Bits - Crush up pretzels and add the bits to the mix for a tasty salty addition.
- Roasted Peanuts - Add roasted peanuts for even more peanut flavor.
If you love recipes like this, you may also enjoy these sweet Krispie bars.
Equipment
It takes next to no equipment to make this peanut butter rice krispies recipe. You'll only need a scant few common kitchen items.
- Measuring cups and spoons
- Mixing bowl
- Spoon
- Saucepan
- Baking dish
Storage
You can keep these treats in an air-tight container at room temperature for about two days. You can also freeze them for up to six weeks.
Tips
This is an exceedingly simple recipe, but there are a few things to remember that will make it even easier on you.
- Remember to work fast. The key to thoroughly mixing your treats is to mix everything while it's nice and hot - and THIN. If your mix begins to set up, it's going to be difficult to mix.
- Stir often when you're melting your marshmallows. If left in one place on direct heat for too long, they'll scorch.

More Rice Krispies Recipes
Do you like Rice Krispies recipes? Here are some recipes you may also like to try
FAQ
Do you have questions about peanut butter cup Rice Krispies treats? Here are some of the most commonly asked questions about Reese's Rice Krispies treats.
They'll last for about two days at room temperature or for six weeks in the freezer.
Place your treats square on a baking sheet and freeze them. Then, wrap them tightly in cling wrap and place them in an air-tight, freezer-safe container or heavy-duty freezer bags.
It's so easy. Just take them out of the freezer and leave them on the counter for about an hour.
This is a thick, gooey recipe to begin with, so it's not a smooth process. However, if you're really having a hard time, you might have let the mixture cool too much before mixing.
Rice Krispies treats are inherently gooey, but if yours are exceptionally sticky and difficult to cut into squares, you probably haven't let them set long enough.
Peanut Butter Cup Rice Krispies Treats
Ready to get cooking? Remember that you can print this recipe if you would like.

Peanut Butter Cup Rice Krispies Treats
Equipment
- 9x13 baking pan
Ingredients
- 4 cups Rice Krispies Cereal
- 1 bag (10 oz) mini marshmallows
- ½ cup peanut butter creamy
- 3 tablespoons butter
- 9 peanut butter cups i.e. Reese’s
- 1 ½ cups candy coated peanut butter candies i.e. Reese’s Pieces, divided
Instructions
- Get out and measure your ingredients.
- Grease a 9x13 baking pan with butter or cooking spray
- Add cereal and 1 cup of peanut butter candies to a large mixing bowl.
- Stir until blended.
- Add butter and marshmallows to a saucepan, and heat over low-medium heat until melted, stirring often.
- Quickly mix in peanut butter, then pour over cereal mixture.
- Place peanut butter cups on top in rows of 3, then press down firmly. Top pan with remaining candies, then press down firmly on those too.
- Pour mixture into prepared pan, and spread evenly.
- Place peanut butter cups on top in rows of 3, then press down firmly. Top pan with remaining candies, then press down firmly on those too.
- Allow to set for minimum 2 hours.
- Then cut into equal pieces and serve.
- Enjoy!
- Every bite!
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