1/2cupRice Krispies cerealor any cereal you prefer
In an over-sized mug or microwave-safe bowl, combine marshmallows and butter. Microwave for 20 to 30 seconds, until marshmallows are puffed up and melty.
Stir until marshmallows and butter are mixed. Add cereal and stir until completely coated.
Enjoy warm out of the mug or scoop mixture out onto a piece of parchment paper. Shape cereal into a bar by folding up the edges of the paper or using two knives to squish the mixture into shape. Allow to set and enjoy.
*If using large marshmallows, use a slightly heaping 1/3 cup of marshmallows.