Sweet and Sour Sauerkraut 1 large can sauerkraut 1 cup catsup or tomatoes 1/2 cup brown sugar 1/2 cup (1 stick) butter 1 large onion Sauté onion in margarine. Add a large can of sauerkraut that has been rinsed and drained. Add brown sugar, catsup, salt and pepper to taste, and simmer for at least 45 minutes.