Mix soymilk and apple cider vinegar together and set aside.
Combine the flour, baking powder, salt and baking soda together.
Cut butter into the flour mixture with 2 knives. Once mixture is crumbly, add in milk (I had to add an extra 3-4 tbs cause it was too dry) and stir till just combined, then add in Scallions and parmesan cheese.
Drop by tablespoons onto greased baking sheet and bake at 400 degrees F for 20-25 minutes or until golden brown.