Step 1

Preheat the oven to 450°F, and thoroughly grease the pan.

Step 2

Melt the tablespoon of butter and set it aside to cool slightly.

Step 3

Break the eggs into a bowl and whisk gently. Then stir in the flour, salt, milk and melted butter until just barely blended; a few lumps are fine.

Step 4

Fill the cups 2/3 to 3/4 full, and bake at 450 for 15 minutes. Reduce oven temp to 350 and bake an additional 20 minutes. (No peeking! Opening the oven door in the first 20 minutes can cause them to collapse.)

Step 5

When they are brown and crusty, remove them from the oven, and make a small slit in their sides with a sharp knife. Serve immediately, or return to turned-off oven. Makes 6 to 10 popovers.