To prepare a strawberry jam squares cookie recipe, first you need to prepare your ingredients. First, you'll need the following ingredients: 1 cup granulated sugar 2 tablespoons margarine 1 tablespoon vanilla 2 teaspoons kosher salt Instructions: Preheat the oven to 325 degrees F. Grease and flour two 9-inch square baking pans. Sift together the flour, baking powder, sugar, and salt. Add the dry ingredients to the wet ingredients and mix until just combined. Press the mixture into the prepared baking sheets. Bake the cookies for 12 to 15 minutes, or until the edges are golden brown. Remove from oven and allow to cool.