This recipe describes how to make chocolate layer bars. It involves making a chocolate filling with chocolate chips, cream cheese and evaporated milk and mixing in vanilla and walnuts. Separately, a crust is made by blending flour, sugar, salt, baking powder, margarine, vanilla and eggs to resemble coarse crumbs. Half the crumbs are pressed into a pan and topped with the chocolate filling, then sprinkled with the remaining crumbs before baking for 35-40 minutes.