Combine 2 cups AP flour, 1 T baking powder, 1/2 t baking soda, 1/2 t salt. Mix well.
Add 1 1/4 cup nonfat yogurt. Fold in until all dry is incorporated.
You can now make drop biscuits if you want. Or spread the dough onto a floured surface and pat down to about 3/4 inch thick.Cut with a floured 2 1/2 inch cutter. Make them the size you want. Cut, combine scraps, cut, combine scraps. Place on a PAM sprayed baking pan.
Bake until golden brown. About 12 minutes.
This recipe is fine for drop biscuits.
Greek yogurt works fine. But will have a stronger yogurt flavor and need a small adjustment in the flour.