Step 1

In a large saucepan, melt the butter over low heat.

Step 2

Add in the marshmallows and stir until completely melted.

Step 3

Remove from heat.

Step 4

Add in the rice krispies cereal and stir until thoroughly coated.

Step 5

Press mixture evenly into a greased 9 x 13 baking pan.

Step 6

Allow to cool slightly and cut into desired sized squares.