Kosher citric acid — often labeled sour salt — is a pantry staple in traditional Ashkenazi cooking, prized for the sharp, clean sourness it brings to borscht, pickles and preserves. It's also a go-to ingredient in kosher and Kosher for Passover baking, where it stands in for lemon juice, helps set jams and jellies, and stabilizes homemade candy and drinks. Below we've rounded up the best kosher-certified citric acid options on Amazon, plus the related pantry ingredients — agar agar, jams, gelatin alternatives and flours — that most often show up alongside it in kosher kitchens.
🍋 Kosher Citric Acid (Sour Salt)
Our top pick, plus other kosher-certified citric acid options.
Our featured pick, Pereg Sour Salt, is the crystal form most home cooks reach for when a traditional recipe like borscht or pickling brine calls specifically for "sour salt" — the crystals dissolve cleanly and give that classic sharp tang without any aftertaste. Fermentaholics and Spiceology's citric acid powders are a better fit for canning, candy-making, and recipes that need a fine powder to blend evenly, while Gefen's sour salt is a trusted kosher pantry staple many households already keep on hand. All four are pareve, so they fit into both meat and dairy kosher kitchens without restriction. If you need citric acid specifically for Pesach, check the individual product listing for a standing OU-P symbol, or confirm it against your local Kashrut Authority's current Passover guide before relying on it.
🌿 Agar Agar — A Kosher Gelatin Alternative
A pareve, plant-based setting agent for jams, jellies and desserts.
Agar agar is the ingredient most kosher bakers reach for when a recipe calls for gelatin, since commercial gelatin is usually derived from non-kosher animal sources and agar agar is pareve, plant-based, and vegan by nature. It's made from seaweed, sets firmer than animal gelatin at room temperature, and works well alongside citric acid in jam and jelly recipes where you need both sourness and a reliable set. Cape Crystal's 1 oz size is enough for the occasional baker, while the 14 oz bag or 4-pack value pack suits anyone making preserves or desserts regularly.
🍓 Kosher Jams
Where citric acid and pectin do their work.
🍮 Kosher Gelatin & Jello
Kosher-certified gelling options for desserts.
Gelatin is one of the trickiest ingredients in a kosher kitchen, since most mass-market brands are derived from non-kosher animal sources. Gefen's Clear Unflavored and Sugarfree gelatin products solve that problem with a kosher-certified formula that behaves the same way in molded desserts and confections. The Raspberry Jello Dessert is a ready-flavored option for Pesach tables. Kosher for Passover status should be reconfirmed each year — packaging and certification can change, so check your local Kashrut Authority's current Passover guide before relying on this for Pesach.
Rounding out the pantry, a good all-purpose flour is the base for the jams, cakes and baked goods that citric acid, agar agar and gelatin alternatives all support. Amazon Grocery's 5 lb bag is a reliable everyday option, King Arthur's organic unbleached flour suits bakers who prefer organic ingredients, and Great River Milling offers a traditionally milled kosher flour for those who want a more artisan result.
🌾 Kosher All-Purpose Flour
Rounding out your kosher baking pantry.
🔍 What to Look For
When shopping for citric acid and the related baking ingredients on this page, kosher certification should always be the first thing you check — look for a recognized hechsher symbol (OU, OK, Star-K, Kof-K and similar) printed directly on the packaging rather than assuming a product is kosher because it "looks" pantry-safe.
For Pesach specifically, a standing OU-P (or equivalent) symbol means the product is permanently trusted for Passover with no need to reconfirm each year. Products without a printed Passover symbol but approved through an agency's annual pre-Passover guide need to be reconfirmed every year, since that list is reissued and items can be added or dropped.
Pareve status matters too — citric acid, agar agar and most gelatin alternatives are pareve, meaning they fit into both meat and dairy kosher kitchens, but it's still worth confirming on the label rather than assuming.
Finally, match the product form to your use: crystals (sour salt) for traditional recipes like borscht and pickling, fine powder for baking and candy-making, and bulk sizes for anyone canning or preserving regularly.
❓ Frequently Asked Questions
Is citric acid the same as sour salt?
Yes — "sour salt" is the traditional name for food-grade citric acid crystals used in Ashkenazi Jewish cooking, especially in borscht and pickling brines.
Is citric acid kosher for Passover?
Some brands carry a standing OU-P (or equivalent) symbol and don't need annual reconfirmation. Others are only approved via an agency's yearly pre-Passover guide — check the product packaging or your local Kashrut Authority's current list before Pesach.
What can I use instead of citric acid?
Fresh lemon juice is the closest substitute for sourness, though it's more diluted than powdered citric acid, so recipes may need adjusting.
Is agar agar kosher?
Yes — agar agar is a plant-based, pareve setting agent derived from seaweed, making it a popular kosher and vegan alternative to gelatin, which is often not kosher-certified.
Why is gelatin often a problem in kosher kitchens?
Most commercial gelatin is derived from non-kosher animal sources. Kosher-certified gelatin alternatives — like agar agar or Gefen's kosher gelatin products — avoid this issue entirely.
Does citric acid help jam set?
Yes — citric acid activates pectin (natural or added) in jams and jellies, helping them set properly while balancing sweetness with acidity.
Can citric acid be used for cleaning as well as cooking?
Yes, though food-grade citric acid bought for kosher cooking should be kept separate from any batch used for household cleaning or descaling.
The Kosher Hub is not a Kosher Authority. For any advice please refer to your local Kashrut Authority.
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Understanding Our Kosher Certifications
The Kosher Hub references products certified by recognized kosher authorities, including OU, OK, Star-K, Kof-K, and CRC. Certification symbols and status can change, so always confirm the current kosher status directly on the product packaging or via the certifying agency's own listings before purchasing.