I love Vera's directions for this recipe. Get ready for a work out! Vera wrote in the margins "The shaking is the secret of success! It causes the berries to absorb the syrup and remain plump and whole. Never cook more than 2 quarts at a time and be sure to SHAKE THE BERRIES!" I know this makes 2 quarts, but am guessing at the servings. Cooking time does not include cooling time.