Ingredients

  • 10 ounces gluten-free elbow pasta
  • 1/4 cup butter
  • 1 1/4 teaspoons salt
  • 3/4 teaspoon mustard powder
  • 4 cups milk
  • 1/4 cup cornstarch
  • 4 cups shredded Cheddar cheese, divided
  • Topping:
  • 2 gluten-free bread slices, toasted and broken into crumbs (optional)
  • 1 teaspoon butter, softened (optional)
  • 1/2 teaspoon paprika (optional)

Method

  • Preheat oven to 375 degrees F (190 degrees C). Grease a 9x13-inch baking dish.
  • Bring a large pot of lightly salted water to a boil. Cook elbow macaroni in the boiling water, stirring occasionally until cooked through but firm to the bite, 8 minutes. Drain.
  • Melt 1/4 cup butter in a saucepan over medium heat. Stir salt and mustard powder into melted butter and remove saucepan from heat.
  • Whisk milk and cornstarch together in a bowl until smooth; stir into butter mixture until well blended. Return saucepan to stove; cook milk mixture, stirring constantly, over medium heat until sauce is thickened, about 5 minutes. Remove saucepan from heat.
  • Stir 3 cups Cheddar cheese into sauce until heat from sauce melts cheese. Add pasta to cheese sauce and stir well; pour into the prepared baking dish.
  • Combine remaining 1 cup Cheddar cheese, gluten-free bread crumbs, 1 teaspoon butter, and paprika in a bowl; sprinkle over pasta mixture.
  • Bake in the preheated oven until top is crunchy, about 30 minutes.