Popover Batter--does it need to be brought to room temperature before baking?

I have a popover recipe that uses a standard batter but starts them cooking in a cold oven -- set oven to 450 degrees F, put in pans with popover batter in the cups. After 25 minutes, lover heat to 300 for 10 minutes. While I assume that the batter should still be room temperature, this technique might allow you cut the waiting time down.

Room temp and preheat the oven to a high temp ... 400F or more.

You will get better results if your batter is at room temp. I would take it out of the fridge about 45 minutes before you want to bake the popovers, but the batter will be fine for up to 2 hours at room temp.

That should have said rises better when at room temp.

Popover batter rises if it is at room temp. Not sure how long to keep it out for.