Cook pasta: Bring a large pot of water to a boil. Add salt and macaroni. Cook them according to the package instructions.½ lb elbow macaroni
While the pasta cooks, make the white cheddar sauce.
Grate the cheese on a box grater and set it aside.2 cups white cheddar
Roux: Melt the butter in the saucepan or Dutch oven. Add the flour and stir it into the butter for about 2 minutes; it should get golden but not brown. ¼ cup butter + ⅓ cup all-purpose flour
Gradually add the milk and heavy cream while whisking continuously to avoid clumps. Keep whisking on medium heat until the sauce thickens and coats the back of a spoon; it will take 3 to 5 minutes. Add sour cream.1 ½ cups whole milk + ¼ cup heavy cream + ¼ cup sour cream
Season with garlic powder, salt, and pepper.½ teaspoon garlic powder + fine sea salt + ground black pepper
Add cheese: Turn the heat to low. Add the cheese and stir until melted. Turn off the heat.
Reserve about ½ cup of the pasta water and drain the rest.
Combine macaroni with the sauce. If the sauce is too thick, add a little of the reserved pasta water and stir again. Add just as much water as needed; you don’t have to add it all. a splash of pasta cooking water
Adjust the taste with salt and pepper and serve immediately.
Notes
The recipe can be easily doubled.
Pasta: Use any other short pasta, for instance, farfalle, fusilli, or penne.
Butter: Salted or unsalted, and use salt accordingly.
Sour cream: You can replace it with crème Fraiche or cream cheese.