Melt butter in medium saucepan on medium heat. Blend in flour, mustard and pepper; cook and stir 1 min. Gradually add milk, stirring until well blended; cook 3 to 5 min. until thickened, stirring constantly. Add 1-1/2 cups cheese and onions; cook 2 to 3 min. until cheese is melted, stirring frequently.
Layer potatoes and cheese sauce alternately in 2-qt. casserole sprayed with cooking spray, ending with cheese sauce.
Bake 1-1/4 hours or until potatoes are tender. Sprinkle with remaining cheese; bake 5 min. or until melted.
Enjoy a serving of this classic side dish as part of a special-occasion meal.
Prepare using your favorite KRAFT Shredded Cheese.
Calories From Fat
% Daily Value*
Total Fat 13g
Saturated Fat 8g
Trans Fat 0g
Total Carbohydrates 24g
Dietary Fiber 3g
* Percent Daily Values are based on a 2,000 calorie diet.
* Nutrition information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin and freshness of ingredients used.