01 - Preheat the oven to 350°F. Generously grease a mini donut pan with cooking spray or butter to prevent sticking.
02 - In a large mixing 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 the eggs until smooth. Add milk, melted butter, and vanilla extract. Whisk until fully incorporated and slightly frothy.
04 - Pour the wet mixture into the dry ingredients. Stir with a spatula or whisk until a thick, smooth batter forms, ensuring no flour pockets remain.
05 - Transfer the batter into a piping bag or use a spoon to distribute it into the prepared donut cavities. Fill each mold about 3/4 full to allow for rising.
06 - Bake for 15-18 minutes until the donuts spring back when lightly touched and a toothpick inserted comes out clean. The tops should be set but still tender.
07 - Let the donuts rest in the pan for 5 minutes to set. Carefully remove them and transfer to a wire rack to cool completely before glazing.
08 - In a small bowl, whisk powdered sugar with 1 tbsp milk and black sesame paste until smooth and glossy. Adjust consistency with additional milk as needed for easy dipping.
09 - Dip the top of each cooled donut into the glaze, letting excess drip off. Sprinkle immediately with additional black sesame seeds. Allow glaze to set for 10 minutes before serving.