Whisk all the ingredients for the Yorkshire puddings together in a bowl. Allow to rest in the fridge overnight.
Put the dripping into pudding moulds and put in the oven until smoking hot. Ladle the mix in or pour from a jug and cook for 30 minutes
For the sauce, cook out the onions until deeply coloured. Add the madeira wine and sherry and stock into a sauce pan and bring to the boil and reduce by half.
Whisk all the ingredients for the Yorkshire puddings together in a bowl. Allow to rest in the fridge overnight.
Put the dripping into pudding moulds and put in the oven until smoking hot. Ladle the mix in or pour from a jug and cook for 30 minutes
For the sauce, cook out the onions until deeply coloured. Add the madeira wine and sherry and stock into a sauce pan and bring to the boil and reduce by half.