Vegan Walnut-Basil Pesto Pasta

About this recipe

Walnut pesto is a revelation for anyone who assumes pesto requires pine nuts. Toasted walnuts bring earthiness and a drier texture that works beautifully in a fully vegan pesto, while fresh basil remains the undisputed star. Nutritional yeast adds umami and a slight cheesy note that rounds out the flavors, creating a sauce that tastes complete rather than lacking something. The basil must be fresh and bright, ideally bought the day you cook. Older basil tastes tired and bitter; new basil tastes alive and grassy. Blend everything until nearly smooth, then loosen with olive oil—this is where technique matters. The pesto should coat pasta ribbons generously and shimmer on the plate, not sit in a greasy puddle at the bottom of the bowl. Here's the critical step: reserve pasta water. This starchy liquid transforms pesto from a thick paste into a silken sauce that clings to every strand. Add it gradually as you toss, adjusting consistency to your preference. Too thick and the pasta feels heavy; too loose and the flavor spreads thin. Serve pesto pasta warm, never piping hot, as extreme heat causes the basil to oxidize and turn dark. Eat immediately after plating. Pesto does not freeze well once tossed with pasta, so make the pesto ahead if you wish, but toss it with pasta only when ready to serve. Pair with a glass of crisp white wine.