Preheat the oven to 220C/200C Fan/Gas 7. Pour 1 teaspoon of oil into eight holes of the muffin tin. Put the tin in the oven and heat for 5 minutes.
Mix the flour
baking powder
xanthan gum and salt in a mixing bowl. Add 300ml/10fl oz of the soya milk. Mix well with a large metal whisk until smooth. Add the remaining milk and mix until thoroughly combined.
Carefully take the tin with the hot oil out of the oven (the oil will be extremely hot). Divide the batter as evenly as you can between the holes using a ladle or (pour from a measuring jug).
Return the tin to the oven and cook for about 25 minutes
