"The secret to these perfectly puffed popovers is to preheat the muffin tin and leave the oven door closed during baking. They're fluffy and delicious...."
INGREDIENTS
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4 large eggs, room temperature
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1 1/2 cups milk, luke warm (110˚ F)
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1 1/2 cups flour
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1/2 tsp. salt
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3 Tbsp. melted butter
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Cooking spray