01 - Preheat the oven to 350°F and grease a mini donut pan thoroughly.
02 - In a large bowl, whisk together sweet rice flour, ground black sesame seeds, granulated sugar, baking powder, and salt until well blended.
03 - In a separate bowl, beat eggs, then add milk, melted butter, and vanilla extract. Whisk until fully combined and smooth.
04 - Pour the wet ingredients into the dry ingredients. Mix until a smooth, thick batter forms, ensuring no dry pockets remain.
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 transfer to a wire rack to cool completely before glazing.
08 - Whisk powdered sugar with 1 tbsp milk and black sesame paste until smooth. Add additional milk as needed to reach a dipping consistency.
09 - Dip the tops of cooled donuts into the glaze and sprinkle with additional black sesame seeds if desired. Allow glaze to set before serving.