1 c. graham crackers
1 c. brown sugar
1/2 c. butter
1/2 c. milk
1 tsp. vanilla
1 (12 oz.) chocolate chips

Bring sugar, butter and milk to a boil. Add 1 cup graham cracker crumbs. Boil until thick. Add chocolate chips and vanilla. Place graham crackers whole in bottom of pan and cover with chocolate mixture. Place another layer of whole crackers on top.