01 - Preheat the oven to 350°F (175°C). Grease a nonstick donut pan thoroughly.
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 the mixture is uniform and well blended.
04 - Pour the wet ingredients into the dry ingredients and stir until a smooth, lump-free batter forms.
05 - Spoon or pipe the batter into the prepared donut pan, filling each cavity approximately 3/4 full to allow for rising.
06 - Bake for 15–18 minutes until the donuts spring back when lightly touched. Cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
07 - Whisk together powdered sugar, cocoa powder, milk (starting with 2 tbsp), and peppermint extract until smooth. Adjust consistency with additional milk if needed to achieve a thick but pourable texture.
08 - Dip each cooled donut into the glaze, allowing excess to drip off. Immediately sprinkle with crushed peppermint candies. Let the glaze set completely before serving.