In a large mixing bowl, add your margarine and sugar and cream together. You’ll know when the mixture is done because it gets progressively harder to mix and it all binds.
Then add your flour and eggs and beat together to form a cake mix.
Take 80g of your white chocolate and chop into chunks. Mix this into the ingredients.
Take your cranberries, roughly chop them just so they’re not huge cranberries going into the mixture, and mix. Once all the ingredients are in there and mixed, spoon into muffin cases on a baking tray and bake for 20-25 minutes or until cooked.
TIP: to know if your muffins are cooked, poke a skewer through the middle. If mixture comes out on the skewer, they are not cooked. The skewer should be completely clear when you remove it.
Once cooked, leave on a baking tray to cool. Top with gratings of nutmeg and the rest of your white chocolate grated too.