Preheat oven to 350 degrees. Cream together butter and sugar.
In a medium bowl, add milk, lemon juice, zest, egg and vanilla.
Ina separate bowl, mix flour, baking powder, matcha and salt.
Alternate wet and dry ingredientsuntil mixed.
Grease and flour large muffin pan 5 to 6 sections. Fill with 1/2 cup of batter. Bake at 350 degrees for about 20 to 25 minutes or until toothpick comes out clean.