In a large mixing bowl, combine Marshmallow Fruity PEBBLES cereal with 3 cups of mini marshmallows. Set aside
In a large saucepan, melt butter
Once butter is melted, slowly add in the remaining marshmallows and mix until smooth
Gradually pour the melted butter and marshmallow mixture into the bowl of Marshmallow Fruity PEBBLES cereal a little bit at a time, mixing until cereal is coated evenly
Scoop the mixture onto the cookie sheets and spread out until even using damp hands
Allow the mixture to harden for about 1-2 hours
Cut the mixture using a greased tree-shaped cookie cutter and place onto wax paper
Decorate trees with warmed frosting (any color) and top with marshmallow pieces
Serve and enjoy! Keep bars in a sealed container to store
