You bought a whole container of ricotta for lasagna, half was used, and now the rest is in the fridge with the lid on. It’s been almost a week. The date on the container has passed. The cap peels off and looks good, smells good. Ricotta going bad, or are you just overthinking it?
Ricotta going bad?
Short answer: Yes, ricotta cheese goes bad, and faster than most people expect. Opened ricotta lasts 1 week in the refrigerator according to USDA FoodKeeper. Unopened ricotta lasts 2 weeks in the refrigerator. Its high moisture content makes it one of the most perishable cheeses you can buy, and unlike hard cheeses, you can’t safely cut off a moldy part and use the rest.
For more information on storing dairy and perishable foods, see Food storage guide.
To take the keys
- Unopened ricotta: 1 week in the refrigerator (USDA FoodKeeper)
- Unopened ricotta: up to 2 weeks in the refrigerator
- Ricotta has almost no natural aroma. It means to eliminate any sour smell or smell.
- Mold anywhere on the container means discarding the entire container, not just the affected area
- Freezing extends the shelf life to 2 to 3 months, but changes the texture significantly
- Frozen and thawed ricotta work well in the oven; not suitable for fresh applications
How long does ricotta last?
Ricotta is a fresh cheese made by heating whey (or whole milk in American-style versions) with an acid until curd, then straining the liquid. This high moisture content is what makes ricotta so creamy and light, and also makes it so perishable. Moisture creates the perfect environment for bacterial growth, which is why ricotta has a much shorter shelf life than cheeses like cheddar or parmesan.
USDA FoodKeeper combines ricotta cheese with a shelf life of 1 week opened and 2 weeks unopened. This is consistent with the guidelines of StillTasty, Tasting Table, Food Republic, and Chowhound, which all cite 1 week as an open window. Some sources quote less than 3 to 5 days. Use 1 week as the outer limit, from the day you opened the container, not the date on the label.
| The type | Refrigerator (Unopened) | Refrigerator (Open) | the freezer |
|---|---|---|---|
| Ricotta (store bought) | Up to 2 weeks | 1 week (USDA FoodKeeper) | 2 to 3 months (texture changes significantly) |
| Homemade ricotta | N/A (use immediately) | 3 to 5 days | 2 months (texture changes) |
| Ricotta salad (seasoned, salted) | Several months without opening | 3 to 4 weeks well packed | It is not recommended |
How to tell if Ricotta has gone bad
Ricotta spoilage is one of the dairy products that is easier to assess because fresh ricotta has almost no smell. Unlike butter or sour cream, which have a natural tang that can mask premature spoilage, fresh ricotta has an almost neutral flavor with just the faintest hint of fresh milk. This makes any odor an immediate red flag.
Signs of deterioration
- Any sour, fermented or musty smell: Standard commercial ricotta has almost no smell. Any sour, fermented or foul smell is not normal and means the cheese should be discarded. (Specialty whole milk or sheep’s milk ricotta may still have a slightly more pronounced milky smell than is normal. The test is whether or not it has a sour active smell, not just a hint of dairy).
- Mold anywhere in the container: Any blue, green, pink, or black mold on the surface, lid, or rim means discard the entire bath. Unlike hard cheeses, the mold in soft cheeses goes under the visible surface. You can’t safely pull out the affected area and use the rest, according to USDA guidelines.
- Yellow or colored pulp: Fresh ricotta is bright white. A yellow, gray or brown body is a sign of spoilage.
- Viscous or watery texture beyond normal separation: Some liquid separation (milk) on top of the ricotta is perfectly normal and can be re-blended. A slimy texture on the curds or a large amount of watery liquid that does not re-stir indicates that the cheese has turned.
- Bitter taste: If it smells and looks good, a sign of spoilage is a bitter or noticeably sour taste that doesn’t match the mild, slightly sweet taste of fresh ricotta.
Normal vs. spoiled: what fresh ricotta really looks like
Normal ricotta:
- Bright white color
- Creamy and slightly grainy texture
- A mild, neutral scent with the slightest hint of fresh milk
- A slight separation of liquid (whey) on top, which is easily stirred
Spoiled ricotta:
- Yellow, gray or brown color
- Too viscous or runny texture that doesn’t mix again
- Any visible mold on the surface, lid or edge
- Acrid, fermented or otherwise smelling
Why you can not cut the mold Ricotta
With hard cheeses like Parmesan or cheddar, USDA guidelines allow for at least 1 inch of trim around a visible mold and use the rest. This works because hard cheeses have little moisture, which limits how far mold roots can penetrate. Ricotta is the opposite: it is a soft cheese with a high moisture content, and the mold penetrates the entire container even if only a small spot is visible on the surface. If you see any mold in the ricotta, discard the entire container. There is no safe way to recover a piece of moldy soft cheese.
Can you freeze ricotta?
Yes, but with an important trade-off. The high moisture content of ricotta means that freezing it creates ice crystals throughout the cheese, which breaks up the delicate structure of the curd. When thawed, ricotta becomes significantly grainier, drier, and softer than fresh ricotta. The water separates from the fat, and even whisking will not restore the original texture.
Frozen and thawed ricotta is used in cooked applications where texture is less important: lasagna, baked ziti, stuffed shells, quiche and other baked dishes. It is not suitable for fresh applications such as ricotta toast spread, cannoli filling or fresh pasta, where texture is central to the dish. To freeze, transfer to an airtight container or freezer bag, removing as much air as possible. Frozen ricotta keeps for 2 to 3 months. Thaw overnight in the refrigerator and stir well before use. Thaw and use within 3 or 4 days.
How to Store Ricotta to Maximize Shelf Life
Good storage practices
See also
- Keep it closed: After opening, press the plastic wrap directly onto the surface of the cheese before closing the lid. This limits exposure to air, which is the main cause of spoilage of fresh cheeses.
- Transfer to an airtight container if the original container does not seal tightly: Many ricotta containers use a foil lid that doesn’t reseal reliably. After opening, transfer to an airtight container.
- Store in the back of the fridge on a middle or bottom shelf: The refrigerator door and the upper shelves experience greater temperature fluctuations. The back of a middle shelf remains cold.
- Use clean utensils every time: A spoon or spatula that has touched other food introduces bacteria into the container and shortens its remaining shelf life.
- Follow the date of opening, not the printed date: The one-week window starts from when you first opened the container, not from the sell-by or use-by date on the label.
Ricotta vs. Cheese: which lasts longer?
Both ricotta and cottage cheese are fresh, high-moisture cheeses, and USDA FoodKeeper gives them the same shelf life: 1 week open, 2 weeks unopened. In practice, they behave similarly and are often interchangeable in cooked dishes. If you find yourself with leftover ricotta but need it for a recipe and aren’t sure if it’s still good, baked cheese is usually a reliable substitute in baked pasta and casseroles. For an explanation of how cheese is compared to spoilage, see cheese goes bad.
Recipes that use ricotta
If your ricotta is reaching the end of the week, use it in a cooked dish. Ricotta is a traditional filling for lasagna, stuffed shells, baked ziti and manicotti. It works well mixed with hot pasta as a quick cream sauce, spooned on top of pizza, mixed with crepe sheets, or mixed with herbs and olive oil as a crostini spread. Especially for cooked applications, ricotta that is a day or two past its limit is perfectly fine after baking. If you are out of ricotta, the cheese it is a reliable substitute in any pasta dish: drain the excess liquid and the texture is almost the same after cooking.
FAQ: Is it safe to cook with ricotta that is nearing its limit?Yes, for baked applications. Cooking kills most bacteria, and ricotta in lasagna, stuffed shells, or quiches is safe to cook at or above 350 degrees Fahrenheit for the entire cooking time, although ricotta is a day or two past its perfect freshness. Exception: If the ricotta shows any active signs of spoilage (must, strong sour smell, or slimy texture), do not use it regardless of the cooking method. Cooking does not neutralize the mycotoxins produced by the mold.
Frequently Asked Questions: Can You Use Ricotta Past Its Expiration Date?It depends on whether the container is open or not. An unopened container that has been refrigerated continuously can often be used a few days after the printed date if it has a neutral odor and is bright white in color. An opened container should be used within one week of opening, regardless of the date. Do not rely on the date after opening the container; the clue when you broke the seal.
Frequently Asked Questions: Is Watery Ricotta Bad?Not necessarily. Fresh ricotta naturally releases whey (a thin, clear or slightly milky liquid) as it sits, and pooling on the surface is perfectly normal. Stir again before using. What’s not normal is an excessive amount of watery liquid that won’t go back into the cheese, or a slimy texture in the curds themselves. If the mixture returns to a smooth, creamy consistency, the ricotta is fine.
FAQ: How is Ricotta different from Ricotta Salad?Ricotta salata is a pressed, salted and aged version of ricotta that has had almost all of its moisture removed. The result is a firm, crumbly cheese that has a much longer shelf life than fresh ricotta, lasting several months unopened and generally 3-4 weeks after opening tightly wrapped, even if you check the specific brand’s directions. It is not as prone to spoilage as fresh ricotta, as the low moisture and salt content prevent bacterial growth. They are not interchangeable in recipes: ricotta salata is used crumbled in dishes such as pasta and salads, not as a creamy filling.
Further reading
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