Step 1 Heat the oven to 350 degrees. In a large bowl with an electric mixer, or in the bowl of a stand mixer, beat the graham cracker crumbs, butter, sugar and flour until moist and well-blended. Press the mixture firmly and evenly over the bottom of a 13- by 9-inch baking pan. Bake until the crust is golden brown, 10 to 15 minutes.