Yorkshire lass born and bred here. I LOVE Yorkshire Pud. Had it in individual little tins, big tins, GIANT tins at the local pub.
My mum always said the way to a great Yorkshire pud is to use 3 eggs, put lard (animal fat) in the tin and don't put the batter in until the melted lard starts to smoke.......can't beat mums puds.
Have also had them as a pudding with treacle on them.
When I grew up we used to save one small Yorkshire pud for out little old Jack Russell. She used to take them out to the garden and bury them. She would go back a day later and dig her pud up and then eat it!