Melt the butter in the microwave and let cool slightly.  In the meantime, whisk the egg and milk.  Slowly stream the melted butter into the egg/milk mixture, while constantly whisking.  Add the flour, baking powder, sugar, and salt and stir with a fork until well combined and the big lumps are gone.  Let the batter stand for 10 minutes.

Heat a non-stick skillet over medium low heat.  Add 1/2 Tablespoon butter and melt in the pan, swirling to coat the bottom.  Using a 1/4 cup measuring cup, pour batter into the pan to form a pancake.  Cook until the top side is bubbly, then flip to cook through on the other side.

Serve with butter and syrup (or your favorite pancake toppings) fresh out of the pan!