If you don't have a tortilla warmer, put a parchment lined half-sheet pan in your oven at 200.
In a large bowl, sift together the flour, baking powder, salt and sugar.
Make a well in the center and pour in the milk, egg and vanilla. Mix until the egg incorporated, then add the melted butter. Make sure the egg is completely incorporated, or the melted butter will make cooked egg lumps in your pancakes.
Let the batter rest for about 10 minutes before preparing the pancakes.
Heat a lightly oiled griddle or frying pan over medium high heat.
Use a small ladle or pour out a small amount, about the size of a silver dollar on to the griddle. Cook until the pancake has bubbles on the surface, then flip.
Cook for an additional minute, then remove them to a tortilla warmer or put them on the half-sheet pan in your oven to keep them warm.
For serving
When the last of the pancakes is finished, melt an additional 2 tablespoons of butter, and if you are serving syrup, carefully heat that, too.
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