Crème d’Asperges Vertes

Crème d’Asperges Vertes (green asparagus cream soup) teaches the discipline of the crème family: the asparagus may give the soup its character, but a pale, supple béchamel gives it grace. Green spears bring a deeper colour and grassier flavour than Crème Argenteuil, yet they cannot disguise a rough foundation. The silk comes from the roux, the blending, and finally the sieve.

The source entry gives this as a one-line variation on Crème Argenteuil, shorthand suited to a brigade where a saucier kept béchamel ready and a tamis stood within reach. At home, you’ll build a smaller thin béchamel in the soup pot and use an immersion blender with a fine sieve. A stockpot never off the fire and a salamander add nothing here. The brigade’s bulk preparation is scaffolding and goes; the pale roux, restrained cooking, straining, and cream finish are the dish and stay. One cook, one stove, one evening.

Keep the roux ivory and whisk in the warm milk gradually. Lumps can be rescued, and the method tells you how, but a browned roux will muddy both the asparagus and the colour. Cooking that roux through without letting it darken is the step that matters most.