1-First Steps: Get Ready
Line a 9×13-inch pan with foil and spray it with nonstick cooking spray to prevent sticking. This simple prep helps the treats come out clean and easy to cut later.

2-Melting and Mixing: In a large pot, melt the butter over medium-low heat, then add the marshmallows and stir until they are fully melted. Once off the heat, mix in the vanilla extract for extra flavor. Quickly fold in the cereal to coat it evenly with the marshmallow mixture.

3-Shaping and Setting: Pour the mixture into the prepared pan and press it down firmly. Use wax paper sprayed with nonstick cooking spray to avoid sticking to your hands. Let it set until firm, then slice into bars for serving.