Leaveners are the ultimate commodity — and the most common yeast brand, Red Star, is actually a Lesaffre/ADM joint venture. But a few genuinely independent makers sell them: an employee-owned baking company, a 100% employee-owned mill, and a family specialty-ingredient shop. Here's where to get the yeast, baking powder, soda, and cream of tartar from a real independent.
Published July 2026 · Updated 7 Jul 2026
King Arthur has been 100% employee-owned since 2004 and is a certified B-Corp. They sell SAF Red and Gold instant yeast — the same yeast professional bakers use — plus baking powder, baking soda, and cream of tartar, all shipped direct with real baking guidance behind every product. The gold standard for a home baker's leavening.
Why it isn't on AmazonAn employee-owned, B-Corp baking company that ships pro-grade SAF yeast direct is a fundamentally different business than a conglomerate yeast brand — your money stays with the bakers.
See it at King Arthur Baking →The 100% employee-owned Oregon mill carries the full leavening set — active dry yeast, baking soda, baking powder — at a fair price, available direct or almost anywhere. Reliable, no-drama baking staples from a company its own workers own. The easy independent default.
Why it isn't on AmazonBuying leaveners from a 100%-employee-owned mill keeps commodity dollars out of the conglomerate joint ventures that make most supermarket yeast.
See it at Bob's Red Mill →An Indiana family company since 1999 specializing in bulk baking and pantry ingredients — baking powder, baking soda, malt powders, and the odd specialty leavener you can't find locally. Free shipping on every order. The place to go when you want a bigger, cheaper-per-ounce bag than the grocery tin.
Why it isn't on AmazonA family specialty-ingredient shop sells the bulk and hard-to-find leaveners the grocery aisle won't stock, direct and with free shipping.
See it at Hoosier Hill Farm →Anthony's sells baking staples in bulk batch-tested bags — including a made-in-USA, food-grade cream of tartar that's genuinely useful if you make meringues, snickerdoodles, or your own baking powder. Gluten-free, non-GMO, no additives. The volume option for the leaveners you go through fast.
Why it isn't on AmazonBatch-tested, made-in-USA cream of tartar in real quantity is a direct-maker product; the grocery aisle only sells it in tiny, overpriced jars.
See it at Anthony's Goods →This seat's open on purpose — we won't pad the list to hit a number. If you ship real yeast, baking powder & soda direct, it's earned, not sold.
Add your brand →Baking soda is pure sodium bicarbonate — it needs an acid in the recipe (buttermilk, yogurt, molasses, lemon) to react and rise. Baking powder is baking soda already combined with a dry acid (often cream of tartar) plus a starch, so it works on its own with just moisture and heat. They're not interchangeable one-for-one; the recipe is built around which one it calls for.
Active dry yeast has larger granules and traditionally gets dissolved in warm water first to wake it up. Instant (like SAF) is milled finer and can be mixed straight into dry ingredients, no proofing needed, and tends to be a bit faster. You can usually substitute them, but instant is the more convenient, forgiving choice for most home baking.
For yeast, stir a spoonful into warm water with a pinch of sugar; if it foams within about ten minutes, it's alive. For baking powder, drop a teaspoon into hot water — it should fizz immediately. For baking soda, add a little vinegar; it should bubble hard. Leaveners lose power with age and humidity, and flat, dense results usually trace back to dead leavening.
Cream of tartar is a mild dry acid. It stabilizes beaten egg whites (for meringues and angel food cake), prevents sugar from crystallizing in candy and frostings, and gives snickerdoodles their signature tang. Mixed with baking soda, it's the acid half of homemade baking powder. Small role, but a few recipes genuinely depend on it.
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