How do you use chicken broth to make a sauce?

Ingrediants: chicken, sour cream, milk, butter, carrots, green peppers, ranch dressing, Directions: First you melt the butter, then you mix the ranch dressing, sour cream, milk, and melted butter into a bowl, then you microwave it on high for 2 minutes, then let it cool for about 1-2 minutes. Then you put cut up carrots and green peppers on top.