Cut the celery root into quarters first, then peel with a sharp knife—this is easier and safer than peeling the whole round vegetable, and reduces oxidation by minimizing exposed surface area.

Cook the celery root and leeks separately until completely tender before blending to ensure silky-smooth texture and prevent any bitter or grainy results in your final soup.

Use a high-quality, unsalted stock so you control the seasoning throughout cooking; vegetable stock lets celery root shine, while chicken stock adds richness without overpowering the delicate flavor.

Stir in a knob of cold butter or a splash of heavy cream at the very end just before serving to create luxurious mouthfeel and add natural glossiness that elevates the soup's visual appeal.

Serve soup at the perfect consistency—it should coat a spoon and be thick enough to hold in a shot glass; add a drizzle of good olive oil and fresh thyme on top for Instagram-worthy appeal that justifies the upscale presentation.