Weekend Cooking: Slow-Cooker Vegetable Broth


Autumn arrived this week, welcoming in another season of delicious soup. Starting on Labor Day weekend and continuing into the fall, winter, and early spring, I usually make a pot of soup every Sunday.  To me, nothing says fall like having football on TV (which we do, all day on Sundays from 9 a.m. until the end of the night game) with soup simmering in the kitchen — preferably in my Crock-Pot.

Soups can be hit-or-miss with the kids (The Girl is definitely not a fan), but served with some kind of sandwich/burger and perhaps a salad, it’s an easy meal with something everyone in this family likes.

(If not, they can make a bowl of cereal.)

I decided to kick off this year’s soup season by making slow-cooked vegetable broth, which I tried for the first time last winter. (Like most of us, I kept telling myself I really needed to do this.).  I keep a gallon-sized bag of vegetable scraps in the freezer. Whenever I’m chopping vegetables, I place the bag in the sink next to me and toss in the tops of bell peppers, slivers of onion, tips of garlic cloves, stems of mushrooms, stalks of broccoli, even gnawed cobs from summer corn. Same with wilted vegetables or ones nearing (or just past) their prime.  It all goes right into the bag and makes for easier clean up.

When the bag gets full, I simply dump everything into the Crock-Pot, cover with water, season with salt, pepper, a bay leaf or two, and some basil, oregano, parsley, etc.  (This is a good way to use up a bit of dried herbs lingering in the jar.)

It usually looks something like this (there’s more spinach than usual since I happened to have a decent amount in the fridge that we hadn’t used during the week):


In addition to the spinach, this contained zucchini, yellow squash, red bell peppers, onions, sweet potatoes, green beans, riced cauliflower, a broccoli stalk, onions, garlic and corn on the cob.

I set the Crock-Pot on low for about 9 hours and left it alone.  Then, I lined a colander with paper towels, set it over a medium-sized bowl, and strained the broth into the bowl, discarding the vegetables. (I suppose those of you who garden could use the vegetable scraps for compost.)

The result? About 6 cups of broth, more than you get in the ready-to-use boxes found in the grocery store. Although they’re not that expensive, making your own is a simple way to save a few dollars and with less sodium, etc.


I kept several cups in the fridge for a minestrone that I made the next day and the rest was frozen in ice cube trays. I’ll use a cube or two in place of oil when sauteeing vegetables or in recipes that require a small amount of broth.

Do you make — or have you tried making — your own vegetable broth?  (Also, if you’re curious about the difference between broth and stock, as I was when titling this post, the latter is usually made with bones. I guess it’s possible, then, to have vegetable stock but not vegetarian stock.) 

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Thanks for sharing this post!

4 thoughts on “Weekend Cooking: Slow-Cooker Vegetable Broth

  1. Beth F

    I really need to do this (ha!). It’s so easy and so much better than store bought. I should have thought of this at the *beginning* of summer, but it’s not too late to start collecting scraps.

  2. Mae

    You didn’t comment on the flavor of your stock compared to boxed vegetable stock. Can you taste distinctive elements from the individual vegetables, or does it come out more or less the same whether you use corn cobs or broccoli stems or whatever?

    best… mae at maefood.blogspot.com

    1. Melissa Post author

      I didn’t taste anything distinctive. I wondered about that, because there were a lot of green beans in this. If anything, it may have been a little on the plain side, but it didn’t impact the minestrone too much.

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