Usually this is a reminder to me that I probably shouldn't be eating them. But I was looking awhile back at the side of a shortbread package, and it said: flour, sugar, butter. So in addition to being gratified that it didn't contain junk, I thought "hm, that sounds pretty easy." I put it to the test yesterday, and the results are yummy! Not only that, it is a lot cheaper to make it from scratch.
I used the recipe from the Joy of Cooking, which techically has 4 ingredients as it calls for both powdered sugar and granulated sugar. I think there is room to fiddle a little with the proportions, but I would definitely make it again. And I don't think I will be buying a packet of shortbread anytime soon.