Scum-free strawberry jam

The finished product

1kg strawberries, hulled
500g jam sugar
1 teaspoon vanilla extract
1 knob butter

The method is the same as before but by adding a knob of butter, scum doesn’t rise to the top so much.

Scrunch the strawberries with your hands to mix the sugar well into the strawberries. Heat the strawberries to the boil in a wide, deep nonstick pan. Boil for 15 minutes and then put into sterilised jars.