Combine flour, sugar, baking powder and matcha powder in a small bowl. Make sure to thoroughly mix before adding in liquids or else the matcha powder will separate and you'll end up with many chunks of matcha powder that won't smooth out.
Add in the egg and milk and stir until smooth. There may be a few bits of matcha powder that don't completely mix, but that's okay. You'll just have a few dark green specks in your mochi.
Take 2 teacups, pour half of the mixture into one and a half into the second teacup. Cook 1 teacup in microwave for 1 min 30 seconds. Repeat with the second teacup. Serve after mochi has cooled
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.