01 - Heat milk in small saucepan until steaming. Remove from heat, add Earl Grey tea bags, and steep for 10 minutes. Remove tea bags or strain loose leaf. Let cool completely to room temperature.
02 - Whisk together mochiko, sugar, baking powder, and salt in large bowl until thoroughly combined.
03 - Whisk melted butter, eggs, infused tea milk, and vanilla extract in separate bowl until smooth and emulsified.
04 - Pour wet ingredients into dry ingredients. Stir gently until just combined and smooth, being careful not to overmix.
05 - Spoon or pipe batter into prepared donut pan, filling each cavity about three-quarters full.
06 - Bake at 350°F for 15-18 minutes until donuts are puffed and toothpick inserted into center comes out clean.
07 - Let donuts rest in pan for 5 minutes before transferring to wire rack. Cool completely before glazing.
08 - Whisk powdered sugar, brewed Earl Grey tea, milk, and vanilla extract until smooth and pourable. Add additional milk one teaspoon at a time if too thick.
09 - Dip tops of cooled donuts into glaze, allowing excess to drip off. Return to wire rack and let glaze set for 15 minutes before serving.