01 - Preheat the oven to 350°F. Lightly grease a nonstick donut pan with cooking spray or oil.
02 - In a large mixing bowl, whisk together sweet rice flour, granulated sugar, cocoa powder, baking powder, and salt until thoroughly blended.
03 - In a separate bowl, whisk eggs, milk, vegetable oil, peppermint extract, and vanilla extract until fully incorporated.
04 - Pour the wet mixture into the dry ingredients. Stir until a smooth, thick batter forms with no lumps remaining.
05 - Transfer batter to a piping bag or use a spoon to distribute evenly among donut pan cavities, filling each about three-quarters full.
06 - Bake for 15-18 minutes until donuts spring back when lightly touched. Cool in pan for 5 minutes before removing.
07 - Whisk powdered sugar, cocoa powder, 2 tablespoons milk, and peppermint extract in a small bowl. Adjust consistency with remaining milk until thick but pourable.
08 - Dip tops of cooled donuts into glaze, allowing excess to drip off. Immediately sprinkle with crushed peppermint candies. Let set before serving.