Start by washing your plums in salty water to get rid of any unwonted dust or bacteria. Once washed, start by slicing, your plum in half then twist the two section of the plum in the opposite direction doing that will help separate the 2 halves without destroying the shape of the plum which makes it easier for slicing later. Then Use a small teaspoon to core out the seed.
Melt the cinnamon butter then add the plum and cook until the water starts to appear and some of the plums starts so dissolve . Add the spices and sugar and cook until the water reduces by half. Add your cornflour with the water and mix until it dissolves then add it in the plum mix and cook until the plum butter reaches 102C or until it starts to look visibly thick.
Place it in a jar or air tight container and allow it to cool down before add closing the lid and placing it in the fridge. The shelf life can be up to 2 weeks if it’s been placed in an airtight container.