To make the vanilla glaze: Stir the ingredients together, adding extra liquid or confectioners' sugar to adjust the consistency as needed. Yield: about 1/2 cup glaze.
To make chocolate glaze: Melt the ingredients together over low heat or in the microwave, stirring often. Add extra corn syrup if needed to make a smooth, shiny glaze. Note: For a reliably shiny finish, choose chocolate whose main ingredient isn't sugar. We've found that using chocolate chips that list sugar as the main ingredient produce glaze that's grainy and dull-looking. Yield: about 1/2 cup glaze.
To make apple cider glaze: Stir all of the ingredients together, adding additional sugar or cream if needed to make the glaze the consistency of molasses. Dip top of doughnuts in glaze, or drizzle glaze over doughnuts. Yield: about 1/2 cup glaze.