Heat 1 Tbsp. of butter and grease the baking pan (approx. 9 x 13 inch).
2
In a large pan melt the butter over low heat. Add marshmallows and stir with a wooden spatula until melted and smooth.
3
Add the puffed rice and mix into the marshmallow mixture until evenly distributed.
4
Remove pan from heat and pour the marshmallow mixture into the buttered baking pan. Evenly flatten the mixture by pressing down from the top with greased hands.
5
Let cool for at least 30 minutes. Cut into squares and enjoy!