Melt butter in a saucepan, add flour and stir until combined. Add milk and cook for 1-2 minutes until thickened. Add cheese and stir until melted. Add ground mustard and season with salt and pepper to taste.
Stir pasta into sauce and serve.
There are 313 calories in 1 serving of Mac N Cheese.
Calorie split: 39% fat, 42% carbs, 18% protein.
Amount Per Serving
% Daily Values*
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.