Special Dark Chocolate Donut Holes

Name: Special Dark Chocolate Donut Holes
Ingredients: * 1 all purpose flour; * 1/4 cup oat flour; * 1/4 cup unsweetened dark cocoa powder (i used hershey's special dark); * 1/2 teaspoon baking soda; * 1/4 teaspoon salt; * 1/2 cup 2% milk; * 1/4 cup packed light brown sugar; * 1/8 cup turbinado sugar; * 1 large egg, lightly beaten; * 4 tablespoon vanilla flavoured greek yogurt (like chobani); * 1 teaspoon vanilla extract