Zebra Parfaits

Chocolate Pudding 3 tablespoons sugar 2 tablespoons unsweetened cocoa powder 2 tablespoons boiling water 2 1/2 tablespoons cornstarch 12 oz evaporated skim milk; divided 2 teaspoons vanilla Vanilla Pudding 2 1/2 tablespoons cornstarch 12 oz evaporated skim milk; divided 3...