1-First Step: Prepare Ingredients and Pan
Measure out the lucky charms cereal, mini marshmallows, and butter. Lightly grease a 9×13 inch baking pan or line it with parchment paper for easy removal of the treats.

2-Second Step: Melt Butter
In a large saucepan, melt the butter over low heat slowly to prevent burning. Stir frequently to promote even melting.

3-Third Step: Add and Melt Marshmallows
Add the mini marshmallows to the melted butter. Stir constantly until the marshmallows are fully melted and combined into a smooth, glossy mixture. If using vanilla extract, stir it in now to add extra flavor.

4-Fourth Step: Fold in Cereal
Remove the pan from heat. Gently fold in the lucky charms cereal, taking care to coat all pieces evenly with the marshmallow mixture without crushing the cereal.

5-Fifth Step: Press Mixture into Pan
Transfer the mixture to the prepared pan. Using a spatula or clean wax paper, press the mixture down evenly but avoid packing it too tightly to maintain a soft, chewy texture.

6-Final Step: Cool, Cut, and Serve
Allow the lucky charm marshmallow treats to cool and set at room temperature for at least 30 minutes, or until firm. Cut into squares or desired shapes and serve. These treats can be enjoyed immediately or stored for later snacking.