Ingredients

• 1 cup whole milk
• 2 large eggs
• 1 cup all-purpose flour
• 2 tablespoons unsalted butter, melted, divided
• 1/2 teaspoon salt
• 1/8 teaspoon black pepper
• 1/3 cup finely chopped provolone
• 2 tablespoons grated parmesan
• 1 1/2 tablespoons chopped chives
• Equipment: a 24-cup mini-muffin pan

Instructions

1. Whisk together milk, eggs, flour, 1 tablespoon butter, salt, and pepper until smooth, then stir in cheeses and chives. Chill 1 hour to allow batter to rest.
2. Preheat oven to 425°F with rack in upper third.
3. Butter muffin pan with remaining tablespoon butter, then heat in oven until butter sizzles, about 2 minutes.
4. Gently stir batter, then divide among muffin cups (they will be about two-thirds full). Bake until puffed and golden-brown, 18 to 20 minutes. Serve immediately.