Easy Cheddar Drop Biscuits

0 Heat oven to 450 F. 
1 Spray a sheet pan with nonstick cooking spray or line it with parchment paper.
2 In a mixing bowl, whisk together flour, baking powder, sugar, salt, and baking soda. Set aside.
3 Melt 1 stick (8 Tablespoons) butter in the microwave or in a saucepan on the stovetop. 
4 While butter is still hot, slowly pour in cold buttermilk while whisking. (The mixture will look slightly curdled or separated which will help to keep the biscuits light; even if your mixture doesn't look curdled - don't worry - just proceed with the recipe as written.)
5 Pour butter-buttermilk mixture over dry ingredients and stir gently until just combined. Stir in cheese and chives. Do not overmix - stop stirring as soon as no dry spots remain and the cheese and chives are evenly distributed.
6 Spray a 1/4 cup measuring cup or cookie dough scoop with nonstick cooking spray. Scoop out biscuit dough and drop it onto the prepared sheet pan.
7 Brush tops of biscuits with the 1 Tablespoon melted butter. 
8 Bake biscuits until golden brown, ~12 minutes.
9 Serve immediately.