1. preheat the oven to 200 c / 400 f / gas mark . line 12 muffin cases.
2.Mix the flour and baking powder together in a large bowl. Rub in the butter untill the mixture is like breadcrumbs. Stir in the sugar and the chocolate chips.
3.In a separate bowl mix the eggs , milk and vanilla extract together , then pour the mixture all at once into the dry ingredients and mix briefly.
4.Spoon the batter into the muffin cases and bake for 15-20 minutes or until risen , golden and firm to touch. cool in the tin for 10 minutes.
5.after 10 minutes of cooling in the tin , transfer to a cooling rack or serve straight away.