Lightly coat a 6-cup popover pan with oil or cooking spray.
Whisk together the milk, eggs and butter in a large bowl until blended. Add the remaining ingredients and mix well.
Place the empty pan in the oven to heat for 7 minutes. Carefully remove from the oven and fill the cups evenly with the batter (this is less messy if you transfer batter to a 4-cup liquid measuring cup).
Bake for 18-20 minutes, then lower the oven temperature to 350 (175C) degrees. Continue baking until the popovers are deep golden brown, 15-18 more minutes.
Cool for 3 minutes in the pan before removing to a rack. Serve warm.
This recipe makes 6 popovers as prepared in a 6-cup popover pan. If you don't have one, use a standard muffin tin to make 10 small popovers
.Reheat cooled popovers in a 350 degree oven for about 10 minutes.