How long does it take to cook a frozen beef wellington?

Answer 1

First remember to defrost the beef thourghly, nothing worse than serving beef with a raw cold piece in the middle (can cause severe stomach upset as well).

Check here to see if you can get an idea, it all depends on the size / portion of the item being cooked.

http://allrecipes.com/Recipe/Beef-Wellington/Detail.aspx

http://www.absoluterecipes.com/beef-rec/beef-wellington.html

Answer 2

If you haven't cooked Wellingtons before you need thermometers... but more importantly you need an oven that holds its temperature as well with one Wellington as with three. Why? Because a Wellington is a "layered" dish - it starts with heavy cool meat inside light somewhat insulating pastry dough. If you increase the temperature you risk burning (or simply overcooking) the pastry. The cooler meat isn't going to protect the outer layer of pastry from the higher temperature. Same for longer time. You simply need an oven that holds its temperature so three Wellingtons take the same time/temperature to cook as one does. And get a thermometer!