The first thing you want to do is melt 1/4 cup of butter in a large saucepan over low heat. Add 1 10 ounce bag of mini marshmallows and stir until completely melted. Stir in 6 cups of rice krispie cereal until it is all coated well. Press into a non- stick or buttered rectangular pan, cut into squares and serve. If the holidays are near, you can always add some colored candy or sprinkles to make it more festive.