I am looking up in my mom's old 1950 Betty Crocker cookbook the Potato Soup recipe: The homey, old-fashioned kind. (that is actually printed in the cookbook, too funny)
Saute' gently in 2 T. butter. . . 1T grated carrot, 1 T scraped onion; Stir in. . . 1t. salt, 1/4t. celery salt, 1/8t. pepper, 2 cups hot milk, 1 cup mashed or boiled potatoes put through coarse sieve. Cook 20 min., stirring occasionally. amount: 6 servings