Preheat the oven to 220°C (425°F) Gas Mark 7
In a medium bowl, combine the flour, sugar, salt and baking powder.
In a separate bowl mix the eggs, milk, butter and vanilla extract together (See Note 1)
Then pour the wet mixture into the dry ingredients and gently mix
Add the chocolate chips and fold them into the mixture
Spoon the batter into the muffin cases (See Note 2)
Bake for 5 minutes and then reduce the heat to 180°C (350°F) Gas mark 4 and bake for 20-25 minutes (See Note 3)
Allow the chocolate muffins to cool in the tin and then transfer to a cooling rack or serve