Grease an 8x8 inch pan (or 9x9") with butter or nonstick cooking spray and set aside.
Place the purple marshmallow peeps in a medium microwave-safe bowl, add 1 tablespoon of butter and microwave for 30 seconds to melt the butter, remove from the microwave, stir and microwave for an additional 15 seconds.
Pour 1.5 cups of the rice cereal into the bowl and mix with a rubber spatula to combine.
Spread the marshmallow mixture into an even layer in the prepared pan, pressing with a piece of parchment paper to prevent sticking if needed.
Repeat these steps with the different colors of peeps until you have a layer of each of the colors.
Top with frosting, sprinkles and extra peeps (if you have them) before cutting them into bars with a sharp knife.
Notes
You can heat the marshmallow mix in a large pot over low heat instead of using the microwave.
If you want an extra gooey treat, add mini marshmallows to the mixture along with the Peeps.
Adding a little food coloring can enhance the color of the Peeps for an even more vibrant Easter dessert.
Store in an airtight container for best results – this keeps them fresh longer!
Press lightly when layering the colors – you don’t want to pack them too tightly or they’ll start to mix.
Try cutting them into fun shapes - use cookie cutters to make Easter-themed designs.
Make a double batch – these go fast, especially if you have a house full of hungry teenagers!