Preheat oven to 350 F (static) 325 F (convection - preferred). Line 12-14 muffin cups with muffin papers or lightly oil. Whisk together gfJules Flour, baking powder, baking soda and salt, then set aside.
In a large mixing bowl, cream sugar, Matcha Tea Powder, milk powder, and butter or vegan alternative, beating until lighter and no clumps remain.
Add yogurt and applesauce, mixing until smooth.
Add the gfJules Flour mixture alternating with milk and vanilla until completely incorporated. If the batter is very stiff, stir in more milk by the tablespoon until it's easily spoonable and smoothable in the muffin cups; depending on the milk used, you may need slightly more than 1/2 cup + 1 tablespoon.
Chop, then fold in pistachios if using.
Spoon equally into muffin cups, then smooth the tops with a wet rubber spatula to smooth. Sprinkle more chopped pistachios on top, if desired.
Bake for 20-25 minutes, depending on the pan used. Check for doneness with a toothpick inserted into the center of a muffin -- when clean or with only a few dry crumbs attached, muffins are ready. They should also spring back to a light touch.
Remove to cool on wire rack and cover, once cooled, to keep fresh.