Begin by melting 3 tablespoons of butter in a medium saucepan over medium heat. Once melted, add in 3 cups of mini marshmallows and stir continuously for about 3–5 minutes until fully melted and smooth.

Remove the saucepan from heat and add a few drops of Wilton Color Right Food Coloring to the melted marshmallow mixture, stirring thoroughly to achieve an even color.

Gently fold in 3 cups of Rice Krispies cereal, stirring for about 2–3 minutes until fully integrated and sticky.

Allow the mixture to cool for about 5 minutes until moldable but still warm.

Using your leaf cookie cutter, press it into the Rice Krispie mixture to create leaf shapes and arrange them on a parchment-lined baking sheet.

Repeat the process for any remaining colors to create a variety of treats.

Let all leaf treats cool completely at room temperature for about 15–20 minutes.

Once set, store in an airtight container for up to a week.