Prepare an 8x8 baking pan by cutting 2 pieces of parchment paper and overlapping them into a cross shape. Make sure the paper overlaps the sides of the pan a little bit. This will be your handles later when you lift the baked bars out of the pan.
Place graham crackers into a food processor and blend until it is all crumbs. You will need about 2-3 of the small packages in the box to make 1 ⅓ cups of crumbs.
1 ⅓ cup graham crackers
In a large bowl, add your ground graham crackers, melted butter, salt and sugar and mix well