Preheat oven to 350 degrees.
Pour egg, milk, gluten free baking mix, sugar and butter into a medium sized bowl and mix until a batter forms.
Grease the donut pan and pour 1 tablespoon of batter into each cavity of the mini donut pan. You can fill these up pretty close to the top. The donuts don't rise very much.
Bake 10-12 minutes at 350 degrees and then remove from pan.
To make the glaze, mix a tablespoon of water with a cup of powdered sugar. You can add more water if the mixture is too thick.
When the donuts are cool, pour on the glaze with a spoon and dip the donuts in sprinkles.
Calories: 50kcal | Carbohydrates: 10g | Protein: 1g | Fat: 1g | Saturated Fat: 1g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 1g | Trans Fat: 1g | Cholesterol: 8mg | Sodium: 40mg | Potassium: 7mg | Fiber: 1g | Sugar: 7g | Vitamin A: 30IU | Calcium: 9mg | Iron: 1mg