01 - Preheat the oven to 350°F (175°C). Grease a nonstick donut pan thoroughly to prevent sticking.
02 - In a large bowl, whisk together the sweet rice flour, granulated sugar, cocoa powder, baking powder, and salt until evenly distributed.
03 - In a separate bowl, whisk the eggs, milk, vegetable oil, peppermint extract, and vanilla extract until fully incorporated and smooth.
04 - Pour the wet ingredients into the dry ingredients. Mix gently until a smooth, lump-free batter forms, being careful not to overmix.
05 - Spoon or pipe the batter evenly into the prepared donut pan, filling each cavity approximately 3/4 full to allow for rising.
06 - Bake for 15-18 minutes, or until the donuts spring back when lightly pressed in the center. Allow to cool in the pan for 5 minutes.
07 - Transfer the donuts to a wire rack and let cool completely before glazing to prevent the glaze from melting off.
08 - Whisk together powdered sugar, cocoa powder, 2 tbsp milk, and peppermint extract until smooth. Add additional milk 1 tsp at a time if needed to achieve a thick but pourable consistency.
09 - Dip each cooled donut into the glaze, allowing excess to drip off. Immediately sprinkle with crushed peppermint candies. Let the glaze set for 10-15 minutes before serving.