Step 1

In a large saucepan or stock pot, melt the butter over low heat.

Step 2

Stir in the marshmallows until they’re just melted, two to three minutes. Editor’s Tip: Do not cook the marshmallows! We just want to melt them into the butter.

Step 3

Stir in the peanut butter and corn syrup until the mixture is melted and smooth, two to three minutes. Stir in the vanilla extract.

Step 4

Remove the pot from the heat, and stir in the Rice Krispies until everything is evenly dispersed and incorporated.

Step 5

Pour the mixture into a 13x9-inch baking dish. Coat your fingers with cooking spray or just a light layer of oil, and press the mixture down into an even layer.

Step 6

Let the bars sit for one hour so they can harden. Finally, slice into bars and serve! Editor’s Tip: If cutting is proving difficult and sticky, carefully grease your knife with a tiny bit of oil.