I wonder about your suggestion of a cookie sheet above the popovers at the end of baking to protect the tops. Wouldn't that only be necessary in an electric oven? I don't think gas ovens have a heating element at the top that is used during baking (or does the broiler come on too?). At the Bake setting, regardless of energy source, only the lower heating element is in operation. Heat will rise to the top of the oven and return downward through convective action. A baking sheet for protection is appropriate for both styles of oven. Frank @ KAF.

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