In a large bowl mix together flour, baking powder, baking soda and salt.
Make a well in the middle of the dry ingredients and add in buttermilk, melted butter and eggs. Stir until batter is well mixed, and not lumpy.
Heat up your waffle maker according to the directions. Pour 2/3 - 1 cup of batter into the waffle maker. Close lid and cook 4-5 minutes or until golden brown.
Serve waffles with syrup, butter or fruit preserves on top. Enjoy!