- 2 1/4 cups hot water
- 1/2 teaspoon dry mustard
- 1 (14 ounce) package KRAFT Deluxe Macaroni & Cheese Dinner
- 1/2 cup BREAKSTONE'S Sour Cream
- Preheat oven to 375 degrees F. Mix water and mustard in 1-1/2-quart casserole. Whisk in Cheese Sauce from Pouch. Stir in dry Macaroni; cover with tight-fitting lid.
- Bake 30 minutes. Uncover; stir in sour cream. Bake, uncovered, an additional 10 minutes. Let stand 5 minutes before serving.