You find a can of sweetened condensed milk in the back of the pantry with a date that passed a while ago, or you used half a can for a recipe and are not sure how long the rest is good for. Does sweetened condensed milk go bad?
The short answer: Yes, sweetened condensed milk goes bad eventually, but it has one of the longest shelf lives of any dairy product. Per Eagle Brand’s official guidance, an unopened can stored in a cool, dry area lasts about 2 years from the date on the bottom of the can. Once opened, it becomes a perishable product: transfer to an airtight container, refrigerate, and use within 1 to 2 weeks. The high sugar content, which makes up roughly 40 to 45% of the product, acts as a natural preservative alongside the heat sterilization process used during canning.
For a full overview of how dairy and pantry staples compare on shelf life, visit our Complete Food Storage Guide.
Sweetened Condensed Milk: At a Glance
Unopened: about 2 years per Eagle Brand. Stored properly, often safe for an additional year or more past that.
Opened: 1 to 2 weeks refrigerated in an airtight container.
Room temperature after opening: do not leave out more than 2 hours per USDA guidelines.
Do not heat the can. Eagle Brand specifically advises against heating cans, opened or unopened, since modern cans are not designed for high heat.
Freezing is not ideal but possible for up to 3 months. The high sugar content can destabilize and cause separation on thawing.
Sugar content (40 to 45%) is the preservative. This is why sweetened condensed milk lasts dramatically longer than evaporated (unsweetened) milk once opened.
Key Takeaways
Sugar is doing most of the preservation work. The high sugar concentration draws water away from any microorganisms that might be present, making the environment hostile to bacterial growth even after the can is opened.
Sweetened condensed milk is a federally defined product. Per FDA regulation 21 CFR 131.120, it is legally defined as milk combined with nutritive carbohydrate sweeteners (such as sucrose) with a portion of the water removed. This definition is why the sugar content is not optional or variable by brand: it is part of what legally makes the product sweetened condensed milk rather than evaporated milk.
Sweetened condensed milk and evaporated milk are not interchangeable. Eagle Brand explicitly states they do not recommend substituting with evaporated milk because it contains no sugar and the recipe will not turn out the same.
Texture and color change over time even when the product remains safe. Older sweetened condensed milk becomes more yellow and noticeably thicker. This is a quality change, not necessarily spoilage.
It is measured by weight, not volume, because of its density. A standard 14oz can measures out to about 10 fluid ounces when poured into a liquid measuring cup, per Eagle Brand.
Never microwave or boil an unopened can. Despite the popular dulce de leche method some older recipes describe, Eagle
