Butter a 9 x 13 pan, line the bottom of the pan with graham crackers
Melt together butter and brown sugar. Bring it to a boil while whisking constantly, it should be at a boil for 2-3 minutes.
Spread over the crackers, let sit for 5-10 min.
Preheat oven to 350. Bake for 10 minutes, then cover with chocolate chips and put back in the oven for 1 minute. Remove from oven and with a spatula spread the chocolate chips. Let cool completely and then cut into little bars.