*ANNE-NOTATION If you can't find gelatin sheets, you can substitute powdered gelatin, but first you need to "bloom" it in water-which just means dissolving it in a little bit of water until it looks sort of like jelly. It takes only a few minutes. Then you need to dissolve it with your hot liquid-it's easy, but sheets are a lot more fun. To use powdered gelatin in this recipe, first bloom one ¼ ounce envelope in 2 tablespoons water, then add it to the mix, and you're back to business as usual.