Vegetable Scrap Broth Recipe: Turn Peels and Ends Into Homemade Stock

What Exactly Counts as a Vegetable Scrap for Broth?

Nearly any clean, edible part of a vegetable that you would normally throw away can become broth. Think onion skins and root ends, carrot peels, celery leaves and base, mushroom stems, garlic paper, leek tops, corn cobs, and herb stems. Avoid scraps from the cabbage family—like broccoli, cauliflower, and Brussels sprouts—because they can turn the broth bitter and sulfurous. Also skip anything moldy, slimy, or spoiled, since those off-flavors will concentrate during simmering.

You do not need to peel or trim scraps before adding them to your stock bag. In fact, the skins and ends often carry the most flavor. Onion and garlic skins add a deep golden color, while carrot peels contribute sweetness. The goal is to use what you have, so do not worry about exact proportions. A good rule of thumb is to keep the mix roughly half allium (onion, garlic, leek) and half other vegetables, with a small amount of herbs for depth.

How Do I Store Scraps Without Them Going Bad?

The easiest method is to keep a resealable bag or container in your freezer. As you prep meals, add peels, ends, and trimmings directly to the bag. No need to wash or chop them further—just let them freeze as you go. If you are concerned about odors, you can blanch scraps in boiling water for one minute, then cool and freeze, but this is optional. Frozen scraps keep well for up to six months, though they are safe indefinitely if kept at 0°F (-18°C).

If you prefer not to freeze, you can also store scraps in the fridge for three to four days. Just keep them in a breathable container or paper towel to prevent moisture buildup. The key is to add them to the broth pot within that window. Freezing is more convenient for most people because it lets you accumulate scraps gradually without worrying about spoilage.

What Is the Basic Vegetable Scrap Broth Recipe?

To make about 8 cups of broth, you will need 4 to 6 cups of frozen or fresh vegetable scraps, 10 cups of cold water, and optional aromatics like a bay leaf, a few black peppercorns, and a sprig of thyme. Place the scraps in a large stockpot, add the water and aromatics, and bring to a boil. Reduce the heat to a gentle simmer, partially covered, and cook for 45 minutes to 1 hour. Do not stir aggressively—you want the liquid to extract flavors without becoming cloudy.

After simmering, strain the broth through a fine-mesh sieve or cheesecloth into a large bowl or pot. Press down on the solids with the back of a spoon to extract as much liquid as possible. Discard the spent scraps—they have given up their flavor. Let the broth cool to room temperature, then transfer to jars or containers. It will keep in the fridge for up to five days or in the freezer for up to six months. For easy portioning, freeze in ice cube trays and then transfer the cubes to a bag.

How Long Should I Simmer the Broth, and Why?

Simmer for 45 minutes to 1 hour for vegetable broth. Unlike meat-based stocks, which benefit from hours of simmering to extract collagen, vegetables release their water-soluble flavors quickly. Longer cooking can make the broth taste overly vegetal or even bitter, especially if you included strong greens or root vegetables. A shorter simmer keeps the flavor bright and clean.

If you want a more concentrated broth, you can simmer for up to 90 minutes, but watch the taste. Start tasting at the 45-minute mark and decide. The goal is a broth that is savory and slightly sweet, not overpowering. Once you strain, you can also reduce the liquid further to make a concentrated stock that you can dilute later.

What Can I Do With the Broth Besides Soups and Stews?

Use your vegetable scrap broth as a base for soups, stews, and chili, or as a cooking liquid for grains like rice, quinoa, and farro. It also works well for steaming vegetables, deglazing pans, or adding moisture to casseroles and sauces. Because the flavor is mild and versatile, it pairs with almost any savory dish without overpowering other ingredients.

You can also freeze the broth in measured portions—like 1-cup or 2-cup containers—for easy use in future recipes. If you find your broth is too strong or too weak, adjust the next batch by adding more or fewer scraps. Over time, you will learn what combination of peels and ends you prefer. This is a flexible method, not a rigid recipe, so feel free to experiment with different vegetable scraps and herbs each time you make it.

What Should I Avoid Putting in the Broth?

Avoid scraps from cruciferous vegetables (cabbage, broccoli, cauliflower, Brussels sprouts, kale, and collard greens) because they can make the broth bitter and give it a sulfurous aroma. Also avoid starchy vegetables like potatoes and sweet potatoes if you want a clear broth—they can make it cloudy and slightly thick. Beets will turn the broth a deep red, which might be undesirable for some recipes, so use them only if you do not mind the color.

Do not use scraps that are moldy, slimy, or have an off smell. While a few wilted leaves are fine, spoiled produce can ruin the whole batch. Also, avoid using oils or butter in the broth, as they can turn rancid and create an unpleasant film. Stick to clean, fresh scraps, and you will get a clean, flavorful stock.