Chop up the graham crackers (about eight crackers are needed).

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

Remove from heat and stir in the marshmallows. Continue to stir the mixture until the marshmallows are completely melted.

Add the popcorn to the melted marshmallow slowly, mixing well as you go.

Add in the graham cracker pieces and, finally, the chocolate chips.

Once you have stirred in the chocolate, put the popcorn mixture in the refrigerator right away.