Hi Alison,
I like to occasionally make Ketogenic Yorkshire Puddings. I just replace the regular flour with Almond Flour, and the regular milk with Almond Milk or Whipping Cream. It's not a like-for-like replacement in terms of taste; they don't taste sweet like traditional Yorkshire Puddings . . . but I think they do taste nice. When I use Almond Milk the ratios, including the fat they are cooked in, are 3% CHO / 12% PRO / 85% FAT (% of kCal), so it's exactly what I'm aiming for in my LCHF diet. And if you like to eat them cold they're useful as a snack for the next couple of days too.
Regards

Antony