We’re staying with friends in San Francisco and this morning they made a Dutch Baby. Actually they also called it a German Pancake which gave me a bit more of a clue as to what it was but as it came out of the oven I realised it’s basically a Yorkshire Pudding. The main difference is that you eat it for breakfast with sweet things like fruit and maple syrup rather than for lunch with beef and gravy but it has the same ingredients and it definitely looks the same.
Googling the difference between them led me down a rabbit hole of finding out about the science of Yorkshire Puddings (sometimes I think most of the internet is people arguing about recipes). This includes an official press release (and recipe) from the Royal Society of Chemistry on the matter and this excellent article by J. Kenji López-Alt which tests some of the techniques people swear make a better pudding pretty scientifically. His conclusion is that the only one that makes a significant difference is leaving the batter to rest overnight.