01 - Preheat the oven to 350°F. Grease a mini donut pan thoroughly to prevent sticking.
02 - In a large bowl, whisk together sweet rice flour, ground black sesame seeds, granulated sugar, baking powder, and salt until evenly distributed.
03 - In a separate bowl, beat eggs until smooth. Add milk, melted butter, and vanilla extract. Whisk until fully combined.
04 - Pour the wet ingredients into the dry ingredients. Mix with a spatula or whisk until a smooth, thick batter forms without lumps.
05 - Spoon or pipe the batter into the prepared donut pan, filling each cavity about 3/4 full to allow for rising.
06 - Bake for 15-18 minutes until donuts spring back when lightly pressed and a toothpick inserted comes out clean.
07 - Let donuts cool in the pan for 5 minutes, then carefully transfer to a wire rack to cool completely before glazing.
08 - Whisk powdered sugar with 1 tablespoon milk and black sesame paste until smooth. Add additional milk as needed to reach dipping consistency.
09 - Dip the tops of cooled donuts into the glaze. Sprinkle with additional black sesame seeds if desired. Allow glaze to set for 10-15 minutes before serving.