Step 1

Position an oven rack to the lowest level in the oven and preheat the oven to 450° F. (Make sure the other rack is removed or at the top of the oven, as the popovers will rise dramatically while baking.) Spray a 6-well popover pan with cooking spray.

Step 2

In a blender; blend together the eggs, milk, and salt on medium-high speed until well combined, about 15 seconds. Add the flour. Blend on medium-high until smooth, about 15 seconds. Add melted butter, blend on medium-high until frothy, about 15 seconds.

Step 3

Immediately pour the batter into the prepared pan, filling each well. Place on a rimmed baking sheet to catch any drips in the oven.

Step 4

Bake on the lowest oven rack for 20 minutes. Without opening the oven, reduce the temperature to 350°F, and continue baking until deep golden brown, about 18 to 20 minutes more. Immediately after they come out of the oven, gently puncture each popover in the center with a pairing knife and remove from the pan. Serve warm.