Jam is definitely the star of these muffins, adding colour, flavour, texture and sweetness, allowing the rest of the recipe to be quite simple. I used Nancy Abra's From My Garden Triple Berry Spread with strawberries, raspberries and blueberries.
The only special addition is bran, which I always add to muffins. To my way of thinking, a muffin needs to be distinct from a cupcake; adding bran means these muffins don’t just taste good, but they work for you, too (ahem).
Pre-heat the oven to 400°F. Place 18 large paper liners in two muffin trays.