Staples - about Gelatin
Gelatin - True gelatin is pure and unsweetened and will solidify any liquid. Don't use too much, however, or you will get a solid, rubbery block. 1 tablespoon of gelatin is enough to gel 2 cups of liquid mixed with 1 to 2 cups of solid ingredients (depending on water content of solids). Gelatin must be softened for about 5 minutes in a cold liquid before it is dissolved in something hot. If the broth or juice that you wish to gel is cold, you can sprinkle the gelatin right onto it and then, when it is soft heat the liquid until the gelatin dissolves. If the liquid is already hot, a freshly made chicken stock, for example soften the gelatin in 1/4 cup of cold water and then dissolve it in the hot stock
Do not let gelatin mixtures boil, the gelatin will lose its vigor. Allow at least a few hours for a gelatin mixture to solidify, overnight if the mold is very large.