Preheat oven to 375degrees F (190 degrees C).
In a medium bowl, beat eggs with milk.Stir in flour.Set aside.
Divide butter evenly into the twelve cups of a muffin tin, about 1/2 teaspoon per cup.Place tin in oven to melt butter, 2 to 5 minutes.Remove tin from oven, and distribute batter evenly among buttery cups.
Bake in preheated oven 5 minutes. Reduce heat to 350 degrees F (175 degrees C), and bake 25 minutes more or until puffed and golden.
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