You bought a whole tub of ricotta for lasagna, used half of it, and now the rest is sitting in the fridge with the lid on. It’s been almost a week. The date on the container has passed. You peel back the lid and it looks good, smells good. Does ricotta go bad, or are you overthinking it?
Does ricotta go bad?
Short answer: Yes, ricotta cheese spoils, and ages, faster than most people expect. According to USDA Foodkeeper, unopened ricotta lasts up to 1 week in the refrigerator. Unopened ricotta keeps for up to 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 out a moldy part and use the rest.
See the Food Storage Guide for more information about storing dairy and perishable foods.
key takeaways
- Opened ricotta: 1 week refrigerated (USDA FoodKeeper)
- Unopened ricotta: up to 2 weeks in the refrigerator
- Ricotta has almost no natural odor. Any kind of sour or bad smell means abandonment.
- Mold anywhere in the container means removing the entire tub, not just the affected area.
- Freezing increases shelf life by 2 to 3 months but results in significant changes in texture.
- Frozen and thawed ricotta work in cooked dishes; Not suitable for new applications
How long does ricotta last?
Ricotta is a fresh cheese made by heating whey (or whole milk in American-style versions) with acid until curds form, then straining the liquid. The high moisture content is what makes ricotta so creamy and light, and it’s also what makes it so perishable. Moisture creates an ideal environment for bacteria to grow, which is why ricotta has a much shorter shelf life than older cheeses like cheddar or Parmesan.
USDA FoodKeeper groups ricotta with cheese and has a refrigerated shelf life of up to 1 week opened and up to 2 weeks unopened. This is in line with guidance from Stilltasty, Tasting Table, Food Republic, and Chowhound, which all cite 1 week as the open window. Some sources cite as little as 3 to 5 days. Use 1 week as the outer limit and track from the day the container is opened, not the date on the label.
| Type | refrigerator (not open) | refrigerator (open) | freezer |
|---|---|---|---|
| Ricotta (store bought) | up to 2 weeks | 1 week (USDA FoodKeeper) | 2 to 3 months (significant change in texture) |
| Homemade Ricotta | N/A (use immediately) | 3 to 5 days | 2 months (texture change) |
| Ricotta Salata (aged, salted) | not open for many months | tightly wrapped for 3 to 4 weeks | not recommended |
How to tell if ricotta has gone bad
Ricotta is one of the easier dairy products to evaluate for spoilage, as fresh ricotta has almost no odor. Unlike buttermilk or sour cream, which have a natural tartness that can mask quick spoilage, the smell of fresh ricotta is almost neutral, with only the faintest hint of fresh milk. Due to this, any kind of foul smell immediately becomes a signal of danger.
Symptoms of Malfunction
- No sour, fermented, or musty odor: Standard commercial ricotta has almost no aroma. Any sour, fermented, or rancid odors are not normal and mean the cheese should be discarded. (Special whole milk or sheep’s milk ricotta may have a slightly more pronounced milky aroma than is still normal. The test is whether it smells actively sour or off, not just mildly dairy.)
- Mold anywhere in the container: Any blue, green, pink, or black mold on the surface, on the lid, or around the rim means discarding the entire tub. Unlike hard cheeses, in soft cheeses the fungus penetrates beneath the visible surface. According to USDA guidance, you cannot safely scrape out the affected area and use the rest.
- Yellow or discolored curd: Fresh ricotta is bright white. Yellow, brown or gray color is a sign of spoilage.
- Sticky or watery texture beyond normal separation: Some liquid separation (whey) at the top of the ricotta is completely normal and can be mixed back in. A sticky texture on the curd, or an excessive amount of watery liquid that does not drain back in, indicates that the cheese has changed.
- bitter taste: If the smell and appearance seem OK, a bitter or markedly sour taste that doesn’t match the mild, slightly sweet flavor of fresh ricotta is a sign of spoilage.
Normal vs. Bad: What Fresh Ricotta Really Looks Like
Normal Ricotta:
- bright white color
- Creamy, slightly grainy texture
- Mild, neutral scent with only the slightest hint of fresh dairy
- A little liquid (whey) separates at the top, which easily drains back.
Bad Ricotta:
- yellow, brown or gray discoloration
- Sticky or extremely watery texture that won’t go back in
- Any visible mold on surface, lid or rim
- sour, fermented, or otherwise odorless
Why can’t you cut the mold out of ricotta?
With hard cheeses like Parmesan or cheddar, USDA guidance allows for cutting off at least 1 inch around the visible mold spot and using the remainder. This works because hard cheeses have a low moisture content, which limits how far the mold roots can penetrate. Ricotta is the opposite: It is a high-moisture soft cheese, and even if only a small speck appears on the surface, mold can take over the entire container. If you see any mold on the ricotta, discard the entire tub. There is no safe way to save a moldy piece of soft cheese.
Can you freeze ricotta?
Yes, but with one important compromise. Ricotta’s high moisture content means that freezing causes ice crystals to form throughout the cheese, which breaks down the delicate curd structure. When thawed, ricotta becomes more grainy, drier, and less smooth than fresh. Water separates from the fat, and even stirring will not restore the original texture.
Frozen and thawed ricotta is best used in baked applications where texture matters less: lasagna, baked ziti, stuffed shells, quiches, and other oven-baked dishes. It is not suitable for fresh applications such as ricotta toast spread, cannoli filling, or fresh pasta dollops, where texture is central to the dish. To freeze, remove as much air as possible and place in an airtight container or freezer bag. Frozen ricotta lasts for 2 to 3 months. Thaw overnight in the refrigerator and stir well before using. Use within 3 to 4 days after thawing.
How to Store Ricotta to Maximize Shelf Life
Best Storage Practices
See also
- Keep it sealed: Once opened, press the plastic wrap directly onto the surface of the cheese before closing the lid. This limits exposure to air, which is the primary driver of spoilage of fresh produce.
- Move to an airtight container if the original packaging does not seal well: Many ricotta containers use a peelable foil lid that does not re-seal reliably. After opening, store in an airtight container.
- Place these on the middle or bottom shelf in the back of the refrigerator: The door and top shelf of the refrigerator experience greater temperature fluctuations. The back side of the middle shelf remains constantly cool.
- Use clean utensils at all times: A spoon or spatula that touches other food brings bacteria into the container and shortens the remaining shelf life.
- Track the opening date, not the printed date: The 1-week window runs from when you first opened the container, not the sell-by or use-by date on the label.
Ricotta vs. Cottage Cheese: Which Lasts Longer?
Ricotta and cottage cheese are both high-moisture fresh cheeses, and USDA FoodKeeper gives them similar shelf lives: 1 week unopened, 2 weeks unopened. In practice they behave similarly and are often interchangeable in cooked dishes. If you have leftover ricotta but need it for a recipe and aren’t sure it’s still good, the cheese is often a reliable substitute in baked pasta and casseroles. For a full breakdown of how cheese goes bad, see Does Cheese Go Bad?
Recipes That Use Ricotta
If your ricotta is nearing the end of its week, use it in baked dishes. Ricotta is the traditional filling for lasagna, stuffed shells, baked ziti and manicotti. It’s added to hot pasta as a quick cream sauce, spooned onto pizza, mixed into pancake batter, or tossed with herbs and olive oil as a crostini spread. Particularly for baked applications, ricotta that is cooked a day or two past its limit is perfectly fine once cooked. If you don’t have ricotta, the cheese is a reliable substitute in any baked pasta dish: Drain off the excess liquid and the texture is nearly identical 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 cooked in lasagna, stuffed shells or quiche at a temperature of 350 degrees Fahrenheit or above for the entire cooking time is safe, even if the ricotta is a day or two past its ideal freshness. Exception: If ricotta shows any signs of active spoilage (mold, strong sour odor, or sticky texture), do not use it regardless of cooking method. Cooking does not neutralize the mycotoxins produced by the fungus.
FAQ: Can you use ricotta after the expiration date?It depends on whether the container is open or not. An unopened container that has been continuously refrigerated can often be used a few days before the printed date if it has a neutral odor and looks bright white with no discoloration. An opened container should be used within 1 week of opening, regardless of what the date says. Do not rely on the date after opening the container; Keep track of when you first broke the seal.
FAQ: Is watery ricotta bad?not necessarily. Fresh ricotta naturally releases whey (a thin, clear or slightly milky liquid) as it sits, and some clumping on the surface is completely normal. Shake it back before using. What is not normal is an excessive amount of watery liquid that will not incorporate back into the cheese, or a sticky texture on the curd. If stirring restores a smooth, creamy consistency, the ricotta is fine.
FAQ: How is ricotta different from ricotta salata?Ricotta salata is a pressed, salted, aged version of ricotta that has had almost all of its moisture removed. The result is a firm, crisp cheese with a much longer shelf life than fresh ricotta, lasting for several months unopened and typically 3 to 4 weeks after opening if tightly wrapped, although check the specific brand’s guidance. It does not have the same risk of spoilage as fresh ricotta because the low moisture and salt content both inhibit the growth of bacteria. They are not interchangeable in recipes: Ricotta salata is used in pieces on dishes such as pasta and salads, not as a creamy filling.
Further reading
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