Standard pickle relish is made from chopped cucumbers, vinegar, sugar, and a handful of spices. That basic formula holds whether you’re buying a jar off the shelf or making it at home, though the proportions and add-ins shift depending on the style. What separates one relish from another comes down to how much sugar goes in, which herbs are used, and whether other vegetables join the mix.
The Core Ingredients
A traditional pickle relish recipe from the National Center for Home Food Preservation calls for chopped cucumbers as the base, along with sweet green and red peppers, onions, white vinegar, sugar, and spices like mustard seed, turmeric, allspice, and whole cloves. The cucumbers do most of the heavy lifting. Under USDA grading standards, any product labeled as pickle relish must contain no less than 60 percent cucumber, with the remaining 40 percent open to other vegetables like cauliflower, onions, peppers, tomatoes, cabbage, or olives.
Vinegar is the ingredient that makes relish shelf-stable. It drives the pH to 4.6 or below, which prevents the growth of harmful bacteria. Sugar balances the sharpness of all that vinegar, and you should never reduce the vinegar to compensate for using less sugar. The acidity is what keeps the product safe. Turmeric gives most relish its characteristic yellow-green tint, while mustard seed and allspice provide the warm, slightly peppery flavor people associate with a classic hot dog topping.
Sweet Relish vs. Dill Relish
The two most common varieties you’ll find at the grocery store are sweet relish and dill relish, and the difference is straightforward. Sweet relish uses a generous amount of sugar (or other sweeteners) and is typically spiced with clove and allspice. Dill relish swaps the heavy sweetness for dill herb seasoning and uses only a minimal amount of sugar. Both start with the same chopped cucumber base in vinegar, so the texture is similar. A tablespoon of sweet relish contains about 2.4 grams of sugar and roughly 122 milligrams of sodium.
You’ll also see “hamburger relish” and “mustard relish” on some labels. These are variations that follow the same 60-percent-cucumber minimum but lean into different spice profiles or add mustard to the mix.
What’s in Store-Bought Relish
Commercial relish sticks close to the homemade formula but often includes a few extra ingredients for consistency and shelf life. Thickeners like xanthan gum are common in mass-produced condiments. They keep the liquid from separating and give the relish a uniform, scoopable texture without changing the flavor. You may also see calcium chloride (a firming agent that keeps the cucumber pieces from going mushy), food-grade dyes like Yellow 5 to boost the color, and distilled vinegar instead of the white wine vinegar a home cook might choose. Reading the label will tell you how far a particular brand strays from the basics.
Chow-Chow and Piccalilli
Step outside standard cucumber relish and you’ll find regional variations built on entirely different vegetables. Southern chow-chow is a relish made from a medley of finely cut cabbage, green tomatoes, carrots, onions, and chives, sometimes with cauliflower or beans mixed in. It’s seasoned with mustard seeds and often hot pepper, then preserved in vinegar with sugar and salt. Unlike cucumber relish, chow-chow isn’t dominated by a single vegetable. It’s a mix, and the recipe changes from household to household across the American South.
British piccalilli takes a different approach. The vegetables, usually cauliflower florets, gherkin slices, beans, onions, and sometimes courgette or bell pepper, are cut into larger chunks rather than finely chopped. The defining feature is a thick, bright yellow sauce colored by turmeric and flavored with a strong hit of mustard. Where chow-chow tends toward a balanced, lightly spiced profile, piccalilli is built on assertive spice and chunky texture.
Indian Relishes and Chutneys
The concept of relish extends well beyond pickled cucumbers. Indian relishes historically included many of the same base ingredients found in American versions, vinegar, sugar, chopped vegetables, but added sesame oil, lemon juice, ginger, garlic, and sometimes chopped mangoes. Chutneys push further still, incorporating chili peppers and tomatoes for a condiment that can range from sweet and fruity to intensely hot. These preparations influenced Western relish-making for centuries. The famous Heinz recipe that became an American grocery staple was loosely based on Indian relishes, combining pickled cucumbers, green tomatoes, cauliflower, white onions, red bell peppers, celery, mustard seed, cinnamon, and allspice in a sugared vinegar base.
Why the Vinegar and Sugar Ratio Matters
If you’re making relish at home, the balance between vinegar and sugar isn’t just about taste. Vinegar provides the acidity that keeps relish safe to eat at room temperature for months. The USDA requires all pickle products, including relish, to maintain a pH of 4.6 or below for their entire storage life. Sweet and mild sweet relishes need a minimum acidity of 1.65 grams of acetic acid per 100 milliliters, while dill relishes can go slightly lower at 1.1 grams. Sugar softens the sour punch but plays no role in preservation. You can reduce sugar in a recipe if the tartness doesn’t bother you, but cutting vinegar to make the flavor milder creates a real food safety risk.