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A creamy, homemade mac and cheese dish in a pan, with melted cheese being sprinkled on top, creating a rich and gooey texture.

How to Make a Roux for Mac and Cheese – No More Lumps!


  • Author: Alex
  • Total Time: 15 minutes
  • Yield: 1 batch (enough for a medium mac and cheese dish) 1x
  • Diet: Vegetarian

Description

A roux is the foundation of a smooth, creamy, and lump-free cheese sauce for mac and cheese. This simple yet essential cooking technique combines fat and flour to create a thickening agent that transforms milk into a velvety béchamel. Whether you’re a beginner or an experienced cook, mastering the roux ensures your mac and cheese sauce is perfectly rich and clings beautifully to the pasta. Follow this step-by-step guide to achieve the ultimate cheesy comfort dish.


Ingredients

Scale

Basic Ingredients

  • 2 tablespoons butter
  • 2 tablespoons all-purpose flour
  • 2 cups milk (warm)

Optional Ingredients for Flavor

  • ½ teaspoon garlic powder
  • ½ teaspoon onion powder
  • ¼ teaspoon paprika
  • ¼ teaspoon cayenne pepper
  • ¼ cup finely minced shallots (optional)

Instructions

  1. Melt the Butter
    Place a heavy-bottomed pan over medium heat and add the butter. Stir occasionally until fully melted and foamy.

  2. Add the Flour
    Gradually sprinkle the flour into the butter while whisking constantly. Continue whisking until the mixture forms a smooth paste.

  3. Cook the Roux
    Let the roux cook for about 2–3 minutes, whisking continuously, until it turns a light golden color. This ensures the raw flour taste is cooked out.

  4. Incorporate the Milk
    Slowly pour the warm milk into the roux while whisking vigorously to prevent lumps. Continue whisking until the mixture thickens, about 5 minutes.

  5. Add Seasonings (Optional)
    Stir in optional spices like garlic powder, onion powder, paprika, or cayenne for extra flavor.

  6. Use for Cheese Sauce
    Remove from heat and gradually add shredded cheese, stirring until completely melted. Your roux-based cheese sauce is now ready for mac and cheese!

Notes

  • Use Warm Milk – Cold milk can cause lumps in the roux. Warm it slightly before adding.
  • Whisk Constantly – This prevents burning and ensures a smooth texture.
  • Control the Thickness – If the sauce is too thick, add a little extra milk. If too thin, cook slightly longer.
  • Storage Tip – Roux can be made in advance and stored in an airtight container in the fridge for up to a week. Reheat gently before use.
  • Alternative Fats – While butter is traditional, olive oil or coconut oil can be used as substitutes.
  • Prep Time: 5 minutes
  • Cook Time: 10 minutes
  • Category: Sauce, Base
  • Method: Stovetop
  • Cuisine: French, American

Nutrition

  • Serving Size: ¼ cup roux
  • Calories: 150
  • Sugar: 4g
  • Sodium: 120mg
  • Fat: 10g
  • Saturated Fat: 6g
  • Unsaturated Fat: 4g
  • Trans Fat: 0g
  • Carbohydrates: 12g
  • Fiber: 0g
  • Protein: 3g
  • Cholesterol: 25mg

Keywords: roux, cheese sauce, mac and cheese roux, béchamel sauce, creamy mac and cheese, how to make roux, thickening sauce, homemade cheese sauce, flour and butter sauce