Cover a baking sheet with foil or parchment paper and spray with cooking spray. I used an 18 x 13 x 1 inch pan. You need the lip on the pan to keep liquid from running off in your oven. Spread the crackers on the pan like in the photo below. In a pan on top of the stove combine the butter and brown sugar. Bring to a boil on medium heat and then boil for 3 minutes. DO NOT STIR WHILE BOILING.