I normally make a big batch of yorkshires and freeze them. I use the volume method, so use a cup/container and add flour, eggs, milk into a bowl and add salt and pepper and then put in a preheated tin and cook until golden.
The tin i use makes 8, as i only need 4 i would freeze the 4 cooked ones as they only take about 4 mins to reheat from frozen in the oven.