Preparation
Peel the apples, remove the core and cut them into small cubes. Put them in a bowl and gradually add all the other ingredients: apple cider, lemon zest, cinnamon, filtered lemon juice and muscovado sugar.
Mix well and put in a thick-bottomed pot. Bring to the boil over high heat. When it boils, cover with a lid and cook over very low heat for at least 30 minutes, stirring continuously.
Puree until smooth with an immersion blender after half an hour. Cover with a lid and cook at least for another 45 minutes, stirring continuously. Fill the thick, smooth cream into glass jars, close and put them upside down to create the vacuum, as you would do for jam.
Store in a cool, dry place. You can use apple butter as a spreadable cream or instead of butter in sweet recipes.