Preheat oven to 350 degrees.
Combine flour, baking powder, baking soda, salt and sugar in a medium bowl. Sift together with a wire whisk.
In another bowl, stir buttermilk, egg, maple syrup and melted butter until just combined.
Add wet ingredients to dry ingredients and stir with a spoon until combined.
Stir in chocolate chips. Reserve a few chips to sprinkle on the tops.
Bake for 8-9 minutes.
Makes 24 mini pancake muffins.