Weigh out the ingredients
I
You'll need marshmallows, rice krispies, lucky charms, butter, and vanilla extract.
Brown the butter
II
In a large saucepan over medium heat, brown the butter, stirring to encourage even cooking. The butter will be ready once it turns a dark golden color and the fat solids have darkened and settled at the bottom of the pan.
Once the butter has browned, turn the heat down to low and add the 12 oz bag of marshmallows and vanilla. Stir frequently until fully melted, then remove from heat.
Add marshmallows & vanilla
III
Immediately fold in the lucky charms and rice krispies cereals until nearly fully coated in the melted marshmallow. Lastly, mix in the reserved lucky charms marshmallows and additional mini marshmallows.
Fold in cereals
IV
Pour the rice krispie treat mixture into the prepared pan and pack down evenly. Top with more lucky charms marshmallows. Set at room temp for one hour or in the fridge for 20-30 minutes. Cut into 16 squares and enjoy!
Pour in pan & chill
V