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Classic Popovers (Makes 6)

1-1/4 cups milk
1-1/4 cups all-purpose flour
  pinch salt
3 large whole eggs
1 large egg yolk
2 tablespoons very soft unsalted butter

1. Heat oven to 425°. Whisk together the milk, flour and salt until just incorporated; the mixture will be lumpy.
2. Beat in eggs and egg yolk, one at a time, until barely incorporated; be careful not to overmix. The batter should still be lumpy.
3. Brush interior of popover pan generously with butter. Divide batter evenly among buttered tins. Bake 20 minutes.
4. Reduce oven temperature to 350°; bake until puffed and golden brown, 15 to 20 minutes more. Remove tins from oven, and turn out popovers; serve immediately.

This batter can be made several hours ahead and chilled.

Note: We like the Nordicware Popover Pan.