To make toffee chip squares cookies, first you will need to prepare your ingredients. In a large bowl, mix together the flour, baking powder, sugar, and salt. Add the wet ingredients to the dry ingredients and mix until just combined. Then stir in the chocolate chips until they are evenly coated. Press the mixture into the bottom and sides of an 8 x8-inch baking pan. Bake the cookies for 12 to 15 minutes or until the edges are golden brown. Remove from the oven and allow to cool.