Brown butter pasta with chicken features tender sautéed chicken, toasted walnuts, and fresh sage tossed in a rich, nutty brown butter sauce for a simple weeknight dinner that's ready in just 35 minutes.
Bring a large pot of salted water to a boil for the pasta.
Place the chicken breasts between sheets of plastic wrap and pound to an even 1/2-inch thickness. Slice crosswise into thin strips and season lightly with salt and pepper.
Melt 2 tablespoons of the butter in a large skillet over medium heat. Add the shallot and cook until softened, 2 to 3 minutes.
Add the chicken and sauté until lightly golden and cooked through, 3 to 4 minutes. Transfer the chicken and any accumulated juices to a bowl and set aside.
Wipe out the skillet and add the remaining 4 tablespoons of butter. Melt over medium heat, then add the walnuts and sage.
Cook, swirling the pan occasionally, until the butter turns golden brown and develops a nutty aroma, about 4 to 5 minutes. Watch closely during the final minute to prevent the milk solids from burning.
Remove the pan from the heat and return the chicken and any juices to the skillet. Stir to coat in the brown butter sauce and cover to keep warm.
Meanwhile, cook the pasta according to package directions until al dente. Reserve 1/4 cup of the pasta water, then drain.
Add the pasta to the skillet and toss with the chicken and brown butter sauce. Add a splash of reserved pasta water as needed to lightly coat the pasta.
Divide among warm bowls and garnish with parsley and a light grating of nutmeg, if desired.
Notes
About the butter - Use unsalted butter for browning whenever possible. It foams less than salted butter, making it easier to monitor the color as the milk solids brown.About the pan - A stainless steel or light-colored enameled cast iron skillet makes it easier to judge the butter’s color and avoid burning.Watch the butter closely - Once the butter begins to foam and turn golden, the milk solids can darken quickly. Remove the pan from the heat as soon as the butter develops a nutty aroma and amber color.