Step 1

Melt 1 tablespoon of butter in a medium pot over medium heat. Add the mushrooms, salt, and pepper and cook until the mushrooms are softened. Remove from the pot.

Step 2

Add the remaining 2 tablespoons of butter and the flour to the pot. Whisk until the flour is toasted, approximately 2 minutes.

Step 3

Add the milk while whisking continuously to avoid lumps. Cook until the sauce is thickened.

Step 4

Whisk in the Parmesan and cheddar cheeses and season with salt and pepper.

Step 5

Add the cooked pasta and mushrooms. Mix until the sauce coats the pasta well.

Step 6

Top with truffle oil and chives.

Step 7

Enjoy!