If you have just one mini muffin pan, refrigerate remaining batter while baking the first puffs. Wash and grease the pan before filling with additional batter. The baking time may be a minute or two longer if batter is cold.
These tasty little puffs can be customized. For vegetarian guests, substitute 1/4 cup finely chopped red or green bell pepper or 2 tablespoons sliced green onions for the bacon.