Preheat oven to 400℉. Prepare baking sheet with parchment.
To a large bowl, add flour, sugar, baking soda, baking powder, salt, and garlic powder. Whisk together.
Add melted butter, sourdough starter, milk, and cheese to the flour mixture and mix everything together well.
Scoop the biscuits onto a baking sheet.
Bake biscuits oven for 15 -20 minutes.
While baking, melt butter and add parsley.
Once they are finished baking, using a pastry brush, brush the melted butter and parsley over top of each biscuit.
