going with melted butter, why not warm it right in the pan so you can start heating up that pan at the same time? you want it nice and hot for pancake time.
just dump the wet ingredients on the dry ingredients and mix it around a bit. a pancake expert knows when to stop. do not over-mix! the best pancakes happen when there are still some clumps of flour floating around in the batter, don’t ask me why.
pour the batter into a hot pan or griddle in pancake-sized discs. if you are making blueberry, banana, or raspberry pancakes, gently pop the fruit on now – if you are using blueberries, 