01 - Preheat oven to 350°F. Grease a nonstick donut pan thoroughly to prevent sticking.
02 - In a large bowl, whisk together sweet rice flour, granulated sugar, cocoa powder, baking powder, and salt until evenly combined.
03 - In a separate bowl, whisk eggs, milk, vegetable oil, peppermint extract, and vanilla extract until fully incorporated.
04 - Pour wet ingredients into dry ingredients. Mix until smooth batter forms without lumps.
05 - Spoon or pipe batter into prepared donut pan, filling each cavity about three-quarters full to allow for rising.
06 - Bake for 15-18 minutes until donuts spring back when lightly pressed. Cool in pan for 5 minutes, then transfer to wire rack to cool completely.
07 - Whisk powdered sugar, cocoa powder, 2 tablespoons milk, and peppermint extract until smooth. Add additional milk if needed to achieve thick but pourable consistency.
08 - Dip each cooled donut into glaze, allowing excess to drip off. Immediately sprinkle with crushed peppermint candies. Let glaze set before serving.