Actually, this is something from so long ago I don't remember it, but my neighbor (whose latest BD was her 90th) told me of it, when she asked me if I used butter or margarine, and she answered her own question by saying something like "Oh, I'm sure you use butter, and I know your cookies have butter!" I told her she was right, and I use butter, but not very often. And that the last time I remember using margarine was when I was a child, and my Mom would use it, due to the cost of butter, which we would have on holidays, and things like that. That's when she asked if I remembered those "little red disks they used to have for coloring the margarine?" I said that was before anything I remember - the margarine was already "yellow" when we got it. But my mind started racing and I caught her before she went back in, and I told her I probably have the stuff they used to make that "red" - annatto. She had no idea what I was talking about, but I told her that they use the stuff for the color, to add to margarine and butter, to make it yellow, and add more to cheeses, to make them orange. She said that as she was thinking about it, she realized that it was something from way back, maybe "during the war", as she put it, but she didn't remember when they stopped it, and the margarine just started coming with the color in it. I told her if she ever feels that her margarine doesn't have enough color, I have some annatto powder. She gave me a look, like "yeah, right!", and went back inside.