These Reese's Rice Krispie Treats are a fun twist to classic Rice Krispies treats - made with a creamy and gooey peanut butter marshmallow base, layer of whole Reese's peanut butter cups in the center, and finished off with a chocolate drizzle topping and more chopped peanut butter cups.
Line a 8x8 inch square baking pan with parchment paper, or spray it with nonstick cooking spray. Set aside.
Peanut Butter Rice Krispies
In a large pot, over medium low heat, melt the butter.
6 tablespoons salted butter
Once the butter has melted, add in 1½ bags of mini marshmallows, creamy peanut butter, and salt. Continue melting over medium low heat, while stirring continuously.
2 bags (10 oz) mini marshmallows, 1/2 cup creamy peanut butter, ¼ teaspoon sea salt
Remove the pot from the heat and immediately stir in the Rice Krispie cereal, vanilla extract, and the remaining half bag of mini marshmallows. Stir everything together really well until all the cereal is fully coated. The mini marshmallows do not need to be completely melted.
Gently press half of the Rice Krispie mixture into the bottom of the prepared pan, and gently flatten without applying too much pressure.
Arrange the 9 Reese's peanut butter cups over the Rice Krispie layer.
9 whole regular-sized Reese's peanut butter cups
Gently press the remaining rice krispie treat mixture over the peanut butter cups in an even layer.
Topping
Sprinkle the chopped Reeses over top.
4 regular-sized Reese's peanut butter cups
In a microwave-safe bowl, melt the chocolate chips, peanut butter, and butter for 2 minutes, making sure to stir it well every 30 seconds, until it's fully melted and smooth.
Drizzle the melted chocolate over top the chopped Reese's in the pan.
Chill the rice Krispy treats for 30 minutes, or leave out at room temperature for 1-2 hours, so they can set and the chocolate can harden. Cut into squares and enjoy!
Notes
I recommend only using mini marshmallows for even melting and better distribution.
Creamy peanut butter works best for it's gooey and really creamy texture, crunchy peanut butter works the best in the topping if you want an extra crunch. I don't recommend using all-natural peanut butter as the texture is thicker and the oil separation will affect the texture of the gooey, soft, creamy crispy treats.
Don't over-pack the layers! Gently pressing keeps the texture light and chewy. If you press too hard, too aggressively, the bars will become dense and tough, and it will end up crushing the hidden peanut butter cups.
Don't be afraid to switch things up! Add a sprinkle of flaky sea salt on top, drizzle with some white chocolate, use peanut butter chips instead of chocolate chips, use crushed Oreos or Rolo candy on top. You could even make a chocolate peanut butter version and use chocolate Rice Krispie cereal.
Use fresh marshmallows! Stale or old marshmallows don't melt as smoothly and can cause a stiff, dry texture.