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 evenly distributed.
03 - In a separate bowl, whisk eggs, milk, vegetable oil, peppermint extract, and vanilla extract until fully incorporated and smooth.
04 - Pour the wet mixture into the dry ingredients. Stir gently until a smooth, thick batter forms with no lumps.
05 - Transfer batter to a piping bag or use a spoon to distribute evenly among donut cavities, filling each about 3/4 full.
06 - Bake for 15–18 minutes until donuts spring back when touched lightly. Cool in pan for 5 minutes before removing.
07 - Whisk powdered sugar, cocoa powder, 2 tablespoons milk, and peppermint extract until smooth. Add remaining milk if needed to reach thick, pourable consistency.
08 - Dip tops of cooled donuts into glaze, allow excess to drip off, then immediately sprinkle with crushed peppermint candies. Let set for 15 minutes before serving.