Preheat oven 375 degrees F. In a large saucepan, melt butter over low heat. Stir in flour, salt, mustard, and pepper until smooth; take off heat. Slowly stir in milk until smooth. Stir constantly for 10 minutes over low heat until thick. Stir in 1-1/2 cups cheddar, Velveeta, and mozzarella cheese until melted.
Put cooked macaroni into a greased 9x13 casserole dish. Pour cheese mixture over noodles and mix well.
Sprinkle left over cheddar and paprika on top. Bake for 20 minutes.
Calories From Fat
% Daily Value*
Total Fat 0g
Saturated Fat 0g
Trans Fat 0g
Dietary Fibers 0g
* 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.