• 200g condensed milk
  • 50g butter
  • 1kg sugar
  • 1 cup milk
  • Optional: Vanilla essence

Put milk, sugar and butter into a heavy saucepan and stir gently over a low heat until the sugar dissolves (about 20 minutes). Add condensed milk and bring to the boil slowly, stirring regularly.

After a few minutes, test the mixture’s consistency by dropping a little into cold water (it should be like soft putty). Add the vanilla essence and allow to cool for a few minutes.

Beat with a wooden spoon until the mixture begins to solidify. Pour into a greased tray and cut into squares.