Dehydrated Scraps for Soup Base

A jar of soup base, made entirely of things I nearly threw away.

I save vegetable scraps: the drier onion skins, the snipped ends of beans, carrot peelings, the light-green parts of leeks, and vegetables gone too soft to serve but nowhere near gone off. They collect in a silicone bag in the freezer until the bag won’t close — which, conveniently, is about one dehydrator-load.

The dried bits get ground to a powder, and that powder goes into soup, pasta sauce, and stamppot — the Dutch mashed-potato dish my family would riot without. I send small jars off with the college-bound children of family and friends, where it has found its true calling: making instant ramen taste like someone loves you.

The method

This batch started with green leek ends I couldn’t bring myself to compost. I peeled away the outer layers, washed off the grit, and sliced the tender inner part. The frozen scraps I defrosted completely and let drain.

Into the dehydrator, wettest scraps on the bottom tray in case of dripping — no cross-“flavoring” on my watch. I run it outside on warm, sunny days, when the solar panels are making more power than we can use or store: free sunshine doing an old-fashioned job, which would have pleased everyone in the 19th century enormously.

Half a day to a full day, and the scraps rattle. I grind them in batches, sieve out the big bits, pick out the odd stem, and regrind once or twice. A batch gives me about two small jars. If one comes out too heavy on a single vegetable, I hold it back and blend it with the next batch for a rounder flavor.

Did the Victorians do this?

Honestly? Not quite — and I’ll say so. In every household manual I searched, the scraps went straight into the stockpot, or to the pigs and chickens. Nothing was wasted, but nothing needed a dehydrator either: the compost heap had a curly tail and gave back bacon.

But drying vegetables for the pantry is thoroughly period. The 19th century knew “desiccated vegetables” — sheets of pressed, dried mixed vegetables issued to soldiers and sailors, who rehydrated them into soup (the soldiers, unimpressed, called them desecrated vegetables). And long before that, travelers carried portable soup — broth boiled down to a dry cake, a proto-bouillon cube that sailed with the Royal Navy. My jar of powdered scraps is the same idea with better press: the pantry version of not letting anything slip past the pot.

So this one is less “from Omi’s books” and more “in Omi’s spirit” — the make-do habit, wearing a modern apron.

Omi’s note

It works, it costs nothing, and the jars vanish faster than I can fill them. Which leaves me with the next question: what else in the scrap bag would grind down this well? The experiments continue — the apple peels are next.

If you dry your own scraps — or know what your Oma did with hers — tell me.

— Omi Knows Best

From the record: “desiccated vegetables,” army and navy rations, 1860s; “portable soup,” 18th-century cookery and the Royal Navy. More on the Sources page.