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Microwave Cheddar Cheese Sauce

Microwave Cheddar Cheese Sauce

Course Appetizer, Condiment, Sauce
Cuisine American
Keyword cheddar-cheese-sauce, homemade-cheese-sauce, microwave-cheddar-cheese-sauce
Prep Time 15 minutes
Cook Time 8 minutes
Total Time 23 minutes
Servings 12 servings (3 cups)
Calories 186kcal
Author Melissa Sperka


  • 4 tablespoon salted butter
  • 2 cup whole milk plus additional for dissolving cornstarch
  • 3 cup freshly shredded sharp cheddar cheese
  • 2 tablespoon grated Parmesan cheese
  • ¼ cup cornstarch
  • ½ teaspoon salt adjust to taste
  • ¼ teaspoon ground mustard
  • ¼ teaspoon garlic powder
  • dash ground nutmeg [optional]
  • black pepper to taste [optional]


  • Melt butter in a large microwave safe bowl.
  • Add milk, cheddar cheese and Parmesan cheese to bowl. Stir well, cover with doubled paper towels, then return to the microwave. Heat on full power for 2 minutes.
  • Dissolve the cornstarch in just enough cold milk to make a slurry to thicken the sauce. Use mitts to safely remove bowl from microwave, it may be hot. Whisk the slurry into the warmed sauce along salt, ground mustard, nutmeg and pepper, if using.
  • The mixture will be thin at this point. Return to the microwave heating in 2 minute increments stopping to whisk each time.
  • Repeat until the cheese is completely melted and the mixture has thickened to your liking. This cheese sauce took three [2] minute cycles total to thicken. The sauce will continue to thicken as it cools.
  • Use immediately or place into an airtight container and chill. See instructions for reheating in Cook's note.


a) If making in advance and chilling the sauce will solidify. Whisk and gently reheat in the microwave. Repeat whisking and heating in small increments until smooth. Add small amounts of milk as needed to thin.
b) This cheddar cheese sauce was made in a1000 watt microwave. Make adjustments to the cooking time based on the wattage of the microwave in use.
c) For the best results use whole milk or 2% milk to prepare.


Serving: 1serving | Calories: 186kcal | Carbohydrates: 5g | Protein: 9g | Fat: 15g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 44mg | Sodium: 336mg | Potassium: 85mg | Fiber: 1g | Sugar: 2g | Vitamin A: 473IU | Vitamin C: 1mg | Calcium: 260mg | Iron: 1mg