The fat in the tin has to be smoking before the batter goes in — that's the entire secret to a Yorkshire pudding rising, and it's why home attempts fail. Chef Emily made everyone wait until they could see it shimmer. The other rule is not opening the oven, which about a third of the call did anyway and immediately regretted. Made as bites rather than full puddings they're an easy canapé, and the horseradish cream cuts the richness of the beef properly.
Noah