STEP 4
Stir in 100g chocolate chips or dried fruit if using.

STEP 5
Fill muffin cases two-thirds full and bake for 20-25 mins, until risen, firm to the touch and a skewer inserted in the middle comes out clean. If the trays will not fit on 1 shelf, swap the shelves around after 15 mins of cooking.

STEP 6
Leave the muffins in the tin to cool for a few mins and transfer to a wire rack to cool completely.