Shop > Platinum Instant Sourdough Find A Store $4.65 – $12.90Price range: $4.65 through $12.90 Platinum Instant Sourdough Quantity Choose an optionSingle packetBundle of 3 packetsBundle of 5 packetsBundle of 10 packetsClear Platinum Instant Sourdough quantity Add to cart SKU: 00331 Category: Yeast Description Additional information Description Platinum Instant Sourdough: Yeast + Sourdough Culture — is a unique, convenient all-in-one-packet solution combining our Platinum yeast with a real, dried sourdough starter. One packet contains 0.63-ounces of Platinum Instant Sourdough Yeast. Current inventory Use By Date is August 2026. For more information about product usage, storage and ingredients view the product page Get free shipping on all Red Star Yeast products Promo code: FREESHIP25 Valid 11/1/2025 through 11/30/2025. Limit one offer per customer. Additional information Quantity Single packet, Bundle of 3 packets, Bundle of 5 packets, Bundle of 10 packets Other Yeast Products Platinum Yeast $10.20 – $28.30Price range: $10.20 through $28.30 Select options This product has multiple variants. The options may be chosen on the product page Red Star Quick-Rise 4-ounce Foil Package $4.99 Add to cart Red Star All-Natural Active Dry Yeast $9.25 – $25.65Price range: $9.25 through $25.65 Select options This product has multiple variants. The options may be chosen on the product page Red Star Active Dry Yeast 4-ounce Jar $7.15 Add to cart