Whisk flour, sugar, baking powder, baking soda, and salt together in a large mixing bowl; set aside.

Whisk buttermilk, eggs, maple syrup, and butter together in another bowl; whisk in flour mixture until lumps are gone.

Heat a large skillet over medium heat; coat with cooking spray. Drop batter by 1/4 cupfuls onto skillet; cook until bubbles appear on the surface, 3 to 4 minutes. Flip; cook until browned on the other side, 2 to 3 minutes. Repeat with remaining batter.