A follow up to the last post is in order. I made the 1-2-4 shortbread (a single serving, in fact) last night. This one came out much better. Same process: chop butter and whip it with a fork, add sugar and whip again, add flour and stir. I shape the dough with my hands, then put it on parchment and slip it in the fridge for 30 minutes. This time I went with 325 degrees instead of 350, but the same cooking time (9-10 minutes). This is just about when the shortbread begins to glisten but not lose its shape.
Remember, this was made with 1/2 tablespoon of sugar, 1 tablespoon of butter, and 2 tablespoons of flour. And it made exactly one shortbread. Working with an amount of ingredients this small is phenomenal - I take one of my tiny sake cups and a tiny fork and can whip the butter with minimal effort; it softens quite easily given how little there is.