You can use any kind of spiced tea for this glaze, such as chai or cinnamon tea. Let a teabag steep in a small cup of hot water for at least 10 minutes, so the flavor is nice and strong. The recipe makes a little more glaze than needed for one batch of cookies, but the excess makes it easier to dip the cookies in the glaze.
Whisk together 4 tablespoons melted unsalted butter, 2 cups confectioners' sugar, 1/4 cup strong brewed spice tea (hot), and a pinch salt in a large shallow bowl. Glaze should be runny. If necessary, rewarm to liquefy before glazing cookies.