How long does molasses last?
Culinary molasses needs its own product instructions. Grandma’s unsulfured sugarcane molasses does not need refrigeration after opening. Crosby’s Canadian storage statement has an unspecified starting event, so it cannot supply a fresh opening allowance. Pomegranate molasses, sorghum syrup and diluted homemade syrups are outside this guide.
Quick answer
FoodKeeper gives molasses a pantry quality reference of one to two years from purchase. NDSU separately supplies the unopened package condition and tightly covered storage. Follow the actual product label.
FoodKeeper counts from purchase; NDSU separately specifies unopened packaging. Neither starts a new period at the printed date.
FoodKeeper separately gives six pantry months after opening as a quality reference. NDSU advises tight closure. Grandma’s explicitly permits its unsulfured sugarcane molasses to stay unrefrigerated after opening.
Count the category reference from opening; preserve prior age and the package date. Grandma’s supplies the refrigeration instruction, not a six-month duration.
Crosby’s recommends 10–21°C (50–70°F). Its general 18-month statement requires storage below 21°C with reasonably steady temperature and humidity.
The FAQ does not identify the starting event or package-opening state. Do not interpret this as 18 months from purchase or opening.
Crosby’s discourages refrigeration or freezing because sugars may crystallize and cold molasses pours less easily. This is a product-quality and handling concern, not a claim that cold storage makes molasses unsafe.
No refrigerated or freezer extension is established here; follow the actual maker’s instruction.
Why guidance varies
The food, maker and storage conditions matter. FoodKeeper starts its pantry references at purchase or opening, while Crosby’s Canadian shelf-life statement leaves the starting event unspecified. These periods cannot be added or restarted.
Match the product state, storage conditions and source clock above. This guide does not provide an automatic expiry timer.
Frequently asked questions
Does every product called molasses use this guidance?
No. Fruit-based pomegranate or date molasses, sorghum syrup and diluted homemade mixtures need different guidance. A product labeled treacle also needs its own ingredient and maker instructions.
Where is Grandma’s product date?
Look on the side of the cap for its best-used-by date. The FAQ does not provide a separate elapsed after-opening period.
Can the purchase and opening references be added together?
No. They describe different events, not consecutive allowances; opening does not erase prior storage or extend the product’s own date.
Sources for this answer
- A U.S. Food and Drug Administration — Are You Storing Food Safely? — General food-safety caution: discard suspicious or contaminated food; normal appearance or smell cannot establish safety. This does not supply a molasses storage period.
- A FoodSafety.gov / USDA FSIS, Cornell University and Food Marketing Institute — FoodKeeper English product data — Separate molasses pantry quality references from purchase and after opening; these are not consecutive allowances.
- A FoodSafety.gov — FoodKeeper App — FoodKeeper describes its purpose as helping preserve food freshness and quality.
- A North Dakota State University Extension — Food Storage Guide Answers the Question . . . (FN579, reviewed January 2023) — The unopened molasses condition and tightly covered handling are separate from FoodKeeper’s purchase starting point.
- B Grandma’s Molasses/B&G Foods — FAQ — Grandma’s unsulfured sugarcane molasses needs no refrigeration after opening; its best-used-by date is on the side of the cap. The FAQ provides no elapsed opening period.
- B Crosby Foods — FAQs — Crosby’s Canadian temperature recommendations, conditional shelf-life statement and cold-storage crystallization/pourability advice. The starting event, opening status and safety-versus-quality meaning of its shelf-life statement are unstated.
- B Crosby Foods — Our Molasses — Crosby’s distinguishes fancy, blackstrap and cooking molasses. Those culinary products do not establish guidance for fruit molasses or sorghum syrup.