Prepare the maple frosting. To make this maple frosting recipe into a glaze, just water it down with a few tablespoons warm water or almond milk. Some people prefer their glaze to be thicker or thiner, so I am leaving that up to you. Then add the natural food coloring until it reaches your desired color tone. You can also make a regular confectioners glaze for the donuts by mixing 2 cups powdered sugar, 1/4 cup almond milk, and natural food coloring.