Prepare the Pan – Lightly spray a 9x12 baking dish with cooking spray and set it aside.

Melt the Butter & Marshmallows – In a large pot over medium heat, melt the butter. Reduce heat to low and add the mini marshmallows, stirring continuously until fully melted.

Color the Mixture – Add green food coloring to the melted marshmallows, stirring until you achieve the desired shade of green. Remove from heat.

Mix in the Cereal – Stir in the vanilla extract, then gradually fold in the Lucky Charms cereal, ensuring each piece is evenly coated in the marshmallow mixture.

Add Extra Magic – If using colored mini marshmallows, gently stir in half of them, leaving some visible for extra color.

Shape the Treats – Pour the mixture into the prepared baking dish. Using wax paper, parchment paper, or greased fingers, press the mixture lightly to form an even layer.

Decorate & Set – Sprinkle with green sprinkles and press the remaining colored marshmallows into the top for extra festivity. Allow the treats to set before cutting.

Speed Up the Process – If you’re in a hurry, place the dish in the freezer for 10 minutes to set faster.

Cut & Serve – Slice into squares and enjoy a fun, festive, and delicious treat!