Pre-heat the oven to 200C (gas mark 6).
Line a 12 hole muffin tin with cases.
Mix together the flour and baking powder.
Add the caster sugar and chocolate chips before mixing again.
In a separate bowl add together the milk, eggs and vanilla extract and whisk together.
Add this liquid mixture to the dry ingredients and combine.
Share the mixture out among the 12 muffin cases.
As a bonus, if you want, add a square of chocolate into the centre of each of these chocolate chip muffins.
Bake for 17-18 minutes until a cake tester comes out clean.
Serve with custard, eat alone or freeze for a later date.