1/2 cup unsalted butter
2 1/2 cups all-purpose flour
4 teaspoons granulated sugar
4 teaspoons baking powder
2 teaspoons kosher salt
1 3/4 cups buttermilk
Preheat oven to 450F degrees. Spray an 8-inch square baking dish with nonstick cooking spray. In a microwave-safe bowl (or you can use the baking dish that you’ll be baking these in), melt butter in the microwave.
In a medium bowl, mix together the flour, sugar, baking powder and salt. Pour in the buttermilk. Stir until a loose dough forms. Batter will be a bit sticky.
Press biscuit dough into baking dish (right on top of the melted butter). Take a sharp knife and cut the biscuit dough into 9 squares before baking.
Bake for about 20-25 minutes, rotating dish once during baking.