What giardiniera is
Giardiniera (jar-din-AIR-ah) is a mix of pickled vegetables, usually cauliflower, carrots, celery, and peppers, in a seasoned brine. The name comes from the Italian for “from the garden.” In Italy it is often served as an antipasto in larger pieces. In the United States, it is best known as a Chicago condiment for Italian beef sandwiches, hot dogs, and pizza.
Chicago-style versus Italian giardiniera. The two are related but not identical. Italian-style giardiniera is generally vinegar-based, with vegetables in larger pieces, and is served as a pickle or antipasto. Chicago-style is typically chopped smaller, spicier, and often packed with oil, which makes it more of a condiment than a side dish. Exact styles vary by maker.
What makes it spicy
Heat usually comes from hot peppers such as serranos, jalapeños, or sport peppers, along with red pepper flakes. To change the heat, adjust the amount and type of hot pepper. Remove seeds and membranes for less heat, or keep them for more. Wear gloves when cutting hot peppers.
Should you can giardiniera?
Honest answer: for most home cooks, the best way to preserve giardiniera is as a refrigerator pickle.
Giardiniera mixes several low-acid vegetables, and often garlic, olives, herbs, and sometimes oil. Combining those with a brine means the acidity of the finished jar depends on the exact proportions. Tested home-canning recipes exist for individual pickled vegetables, but I am not aware of a widely published, lab-tested recipe for a Chicago-style hot giardiniera. Water bath versions of giardiniera that have not been lab-tested are not a safe choice.
So the conservative guidance is:
- Refrigerator giardiniera: safest, crunchiest, and easiest. Use this by default.
- Shelf-stable giardiniera: only from a tested recipe, followed exactly. Do not can an untested giardiniera recipe.
Vegetables and ingredients
A typical mix includes:
- Cauliflower florets
- Carrots, sliced thin
- Celery
- Red bell pepper for sweetness and color
- Hot peppers (serrano, jalapeño, or similar)
- Onion
- Garlic
- Optional: pitted green olives, pearl onions, or green beans
- Vinegar (white wine vinegar or white vinegar), water, and salt
- Spices such as oregano, celery seed, black peppercorns, fennel seed, mustard seed, and red pepper flakes
Cut the vegetables small for a condiment style or larger for an antipasto. Cutting evenly makes them pickle evenly. For a simpler refrigerator pickle of the same vegetables, see pickled cauliflower, carrots and celery or an instant cauliflower pickle.
Refrigerator giardiniera method
This is a general method; adjust the amounts to the size of your jars.
- Chop the vegetables and put them in a large non-reactive bowl.
- Salt them. Sprinkle with kosher or pickling salt, add enough cold water to cover, and refrigerate overnight (at least 6 hours). This draws out water so the brine is not diluted and helps the vegetables stay crunchy.
- Rinse and drain well. Rinse under cold water and drain thoroughly.
- Make the brine. Combine vinegar, water, and a little salt, with equal parts vinegar and water as a common ratio. Heat until the salt dissolves, then cool.
- Pack the jars. Add the spices to clean jars, press the vegetables in, and pour the brine over to cover.
- Chill and wait. Cover, refrigerate, and let the flavors blend for at least a few days before eating. Ball’s published refrigerator version suggests at least 3 days.
Keep the vegetables below the brine. Eat within a few weeks, or follow the guidance of your recipe.
If you want shelf-stable giardiniera
If you want pantry-stable jars, use a tested pickled-vegetable recipe from the National Center for Home Food Preservation (nchfp.uga.edu) or the USDA Complete Guide to Home Canning, and follow it exactly, including the vinegar, salt, vegetable amounts, jar size, and process time. NCHFP publishes tested recipes for pickled vegetables such as cauliflower, carrots, peppers, and mixed pickles. See canning banana peppers for how pickled peppers work. Otherwise, make giardiniera as a refrigerator pickle using the method above.
Many cooks who want pantry-stable jars simply pick a tested pickled pepper or relish recipe, such as sweet pepper relish, instead.
Oil, garlic, and olives: safety notes
- Oil. Traditional Chicago-style giardiniera is often topped or packed with oil. Oil-packed vegetables are a concern for botulism if not kept cold, because oil can create an oxygen-free environment. Add oil to the jar you are about to eat from, not before canning, and keep oiled giardiniera refrigerated.
- Garlic. Fresh garlic is low-acid. A few cloves in a refrigerator pickle are fine; do not add extra garlic to a canned recipe.
- Olives. They add flavor and salt but are additional low-acid, brined ingredients. They are fine in a refrigerator batch; for a canned recipe, only include them if the tested recipe does.
- Freezing. Frozen giardiniera loses its crunch. It is not recommended.
Keeping it crunchy
- The salt soak is the key step.
- Use fresh, firm vegetables.
- Do not boil the vegetables in the brine for long. Refrigerator versions do not need to be cooked.
- Keep the jars cold.
Storage
Store refrigerator giardiniera in clean jars, covered in brine, in the fridge. Use clean utensils each time. Discard it if you see mold, slime, off smells, or fizzing. If you use a tested canning recipe and the jars are sealed, store them in a cool, dark place and refrigerate after opening.
Ways to use giardiniera
Put it on Italian beef sandwiches, sausage, hot dogs, and pizza. Chop it into pasta salad or potato salad, spoon it onto eggs, or stir it into cream cheese for a spicy dip. Drizzle olive oil on a portion at serving time, which is the traditional way to finish it. The leftover brine makes a good base for a vinaigrette.