Here comes the recipe you asked for Anne — I'm sorry you had to wait. There have been a couple of e-mails regarding baking bread, which I'll answer soon (I hope).
You find a conversion calculator here.
1 kg apples,
100 - 200 g muscovado sugar
100 g butter
2 tsp ground cinnamon
1 tsp ground cloves
½ tsp all spice
Peel, core and chop the apples and cook them in a small amount of apple juice or water, until soft.
Add the remaining ingredients and let it simmer in water bath until it thickens. Don't let it boil!
I'm more generous with the spices than written here — I'd say this is a minimum. As for sugar, how much you use depends on how sweet the apples are — I never take more than 100 g.
You can use this recipe for most fruit butters — when I make pear butter I exchange cinnamon for ginger.