Beat the egg in a bowl with a spoon
Add the milk, vanilla extract and sugar (optional) to the egg and continue mixing
On a medium speed, start whisking the mixture whilst adding the xanthan gum and flour in parts (this reduces the risk of lumps)
Keep adding the flour whilst mixing until all has been added together
Beat the mixture for a few more minutes on high speed until it froths
Leave to set for 5 minutes whilst you heat the pan
Add oil/butter to the saucepan and place on a medium heat setting
Once the oil/butter has heated, pour a thin layer of batter onto the pan and swirl until the batter coats the surface evenly
Cook for about 2 minutes and then carefully flip the pancake over using a spatula
Cook for a further 2 minutes on the other side then pop onto a plate (use kitchen towels on the plate to soak up any excess oil on the pancake - I place one sheet between each one)
Continue to repeat this until all the batter has been used
Add your toppings (sugar and lemon for me) and enjoy whilst warm!
