01 - Preheat oven to 350°F and lightly grease a donut pan.
02 - Heat milk in a small saucepan until steaming. Remove from heat, add Earl Grey tea bags, and steep for 10 minutes. Squeeze out and discard tea bags or strain if using loose leaf. Allow to cool to room temperature.
03 - In a large bowl, whisk together mochiko, sugar, baking powder, and salt until well blended.
04 - In a separate bowl, whisk melted butter, eggs, infused milk, and vanilla extract until smooth.
05 - Pour wet ingredients into dry ingredients. Stir until just combined and smooth, being careful not to overmix.
06 - Spoon or pipe batter into prepared donut pan, filling each cavity about 3/4 full.
07 - Bake for 15-18 minutes until donuts are puffed and a toothpick inserted comes out clean.
08 - Let donuts cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
09 - In a bowl, whisk together powdered sugar, brewed Earl Grey tea, milk, and vanilla extract until smooth and pourable. Adjust consistency with additional milk if needed.
10 - Dip cooled donuts into glaze. Return to wire rack and let glaze set for 15 minutes before serving.