Combine flour, sugar, baking powder, baking soda and salt in a large bowl.
In a separate bowl, beat buttermilk, milk, eggs melted butter and vanilla together.
Using a wooden spoon, mix the wet and dry ingredients together until just combined.
Fold in chocolate chips. Don't overmix! There will probably be flour lumps which is okay.
Pour 1/2 cup of batter at a time onto a lightly greased, heated griddle on MED-HIGH heat.
Cook until golden brown on both sides and serve warm.