Mulled-Cider Cranberry Sauce

Love this cranberry sauce! Made it once for Thanksgiving, some said it was too sour, but I love the taste. I'm making a quadrupled batch right now to can for the winter.

Very similiar to one I already make, my additions are 1/4 cup chopped walnuts and a small can of drained crushed pineapple added while cooling. I also only cook it for about 10 minutes or so.