If you're short on ingredients and can't make some of the more complicated recipes, this recipe for Scottish shortbread takes the cake - no pun intended - and only calls for three ingredients. First, preheat your oven to 325 degrees Fahrenheit. Soften the butter and mix thoroughly with the brown sugar. After it is mixed, add about 3/4 of your flour, a little at a time until well blended. Next, layer a flat surface like a cutting board with the remaining flour (about 3/4 of a cup) and begin to knead the dough on it. Shape the dough into 4" x 2" rectangles that are about a half-inch high. Poke around a dozen holes in the cutout with a nail or other similar object and place on an un-greased cookie sheet. Bake in the oven for 20 - 25 minutes or until just slightly golden brown. Enjoy.