Potato Cheese Soup | Grandma Nancy's Cookbook

Ingredients

• 2 tablespoons butter
• 1 celery stalk, finely diced
• 1 small onion, finely diced
• 1 3/4 cups chicken broth
• 3 large baking potatoes, peeled and diced
• 2 teaspoons white vinegar
• 3 tablespoons all-purpose flour
• 2 1/2 cups milk
• 1/4 teaspoon salt, plus additional to taste
• 1 teaspoon black pepper
• 2 cups (8 ounces) shredded Cheddar cheese