Pasta with Walnuts

This fettuccine dish takes a different approach to creamy pasta sauce by building it in the microwave while the noodles boil on the stove. Onions and garlic soften in oil, walnuts get stirred in and toasted, then sour cream and grated Parmesan melt together into a thick, nutty coating that clings to every strand.

The sour cream does something different than heavy cream would. It brings a tangy edge that cuts through the richness of the Parmesan and butter, keeping the dish from feeling leaden. Stirring every 30 seconds prevents the cheese from clumping and keeps the sauce smooth.

Toss the hot fettuccine in butter first, then spoon the walnut sauce on top. That butter layer helps the sauce slide evenly across the pasta instead of sitting in a lump in the center.

Kitchen Tips

• Use freshly grated Parmesan, not the pre-shredded kind. Pre-shredded cheese has anti-caking agents that prevent it from melting smoothly into the sauce.
• Don’t overheat the sour cream in the microwave. It can curdle if it gets too hot, so stir frequently and use short bursts.
• Toast the walnuts in the microwave for just 2 minutes. They go from toasty to burnt quickly, so watch them closely.
• Toss the pasta with the sauce immediately after draining. Hot pasta absorbs the sauce better than cooled noodles.

Variations

• Brown butter version: Skip the microwave and brown the butter on the stove. Toss the walnuts in the browned butter for a deeper, nuttier flavor.
• Herb addition: Stir in fresh sage or thyme leaves with the walnuts. Both pair naturally with brown butter and nuts.
• Blue cheese twist: Replace half the Parmesan with crumbled Gorgonzola for a bolder, tangier sauce.