Cultured cream — including crème fraîche and similar fermented cream products — keeps 1 to 2 weeks in the refrigerator after opening when stored at 40°F (4°C) or below in a closed container. Cultured cream is cream fermented with bacterial cultures, which makes it thicker and tangier than regular cream; it is used in sauces, soups, desserts, and as a topping. Like all dairy, it must be refrigerated and has a limited shelf life once opened. This guide covers how long cultured cream lasts in the fridge, how to store it, how to tell if it has spoiled, and whether you can freeze it. Storage times follow standard food-safety practice and typical manufacturer guidance.

How Long Does Cultured Cream Last in the Fridge?

Cultured cream (for example, crème fraîche) typically keeps 1 to 2 weeks after opening when stored at 40°F or below. Before opening, follow the use-by or best-by date printed on the package. Once opened, keep the container closed and store it in the main body of the fridge, toward the back where the temperature is most stable. The U.S. Department of Agriculture (USDA) and the Food and Drug Administration (FDA) recommend refrigerating all dairy at 40°F or below and using it by the date on the package or within the manufacturer's stated time after opening.

Why the 1–2 week window? Cultured cream is fermented, which gives it a slightly acidic environment that slows some spoilage — but it is still a dairy product. Bacteria and mold can grow if the product is left open, stored warm, or kept too long. Keeping the lid on and the product cold protects both quality and safety.

What Is Cultured Cream?

Cultured cream is cream that has been fermented with bacterial cultures, similar to how yogurt is made. Crème fraîche is the most common type: it is thick, spoonable, and mildly tangy, and it is used in sauces, soups, desserts, and as a topping. Unlike regular cream, cultured cream is less likely to curdle when heated, which makes it useful in cooking. Because it is cultured, it has a slightly longer fridge life than plain cream once opened — but it still must be refrigerated and used within a reasonable time. If you have more than you can finish, add it to a recipe that uses a larger amount rather than letting it pass the 1–2 week window.

How to Store Cultured Cream in the Fridge

Keep the product in its original container with the lid tightly closed. If you transfer it, use a clean, covered glass or plastic container and use it within 1–2 weeks of the original opening date. Store the container on a shelf toward the back of the refrigerator, not in the door — the door is the warmest part of the fridge and its temperature swings every time you open it. Keep the refrigerator at 40°F or below and use an appliance thermometer to verify.

Use a clean spoon every time you serve cultured cream. Do not double-dip and do not leave the container open on the counter for long periods; return it to the fridge right after use.

How to Tell If Cultured Cream Has Spoiled

Discard cultured cream if it has an off or sour smell beyond its usual tang, if you see mold of any color, or if the texture or color looks wrong. A slight separation (a little liquid on top) is normal and can be stirred back in. But if the separation is excessive, or the product looks lumpy, yellow, or otherwise off in a way that is not normal for the brand, throw it out. Do not taste it to check — when in doubt, throw it out.

Even if the product still looks and smells fine, respect the 1–2 week guideline after opening and the use-by date. Bacteria and mold can grow to unsafe levels before the product clearly looks or smells bad.

Can You Freeze Cultured Cream?

Freezing cultured cream is possible but not ideal. The texture can change — it may separate or become grainy after thawing. If you do freeze it, plan to use it in cooked dishes such as sauces and soups rather than as a cold topping. Thaw it in the refrigerator, stir well before use, and use it within a few days. For the best quality, use refrigerated cultured cream within 1–2 weeks of opening and only freeze what you cannot use in time.

Crème Fraîche vs. Sour Cream

Crème fraîche and sour cream are both cultured dairy products, but they are not the same. Crème fraîche has a higher fat content and is less likely to curdle when heated, so it works well in hot sauces. Sour cream has a lower fat content and can break or curdle when boiled. Both should be refrigerated at 40°F or below after opening, and both typically keep 1–2 weeks once opened. Check the label for the manufacturer's specific recommendation.

Refrigerator Temperature and Dairy Storage

All dairy, including cultured cream, keeps best at 40°F or below; a fridge that holds 38°F is even better for perishables. Many home refrigerators run warmer than their dial suggests, so place an appliance thermometer in the main body of the fridge (not the door) and adjust the thermostat until the reading stays at 40°F or lower. Store dairy on shelves rather than in the door, and avoid overpacking so cold air can circulate and blocked vents do not create warm spots. Consistent cold helps dairy and other perishables last longer. For refrigerator temperature guidance and model comparisons, see Fridge.com.

After a power outage, keep the refrigerator door closed as much as possible; a full fridge holds a safe temperature for about 4 hours. Once power returns, check the temperature with a thermometer. If the fridge was above 40°F for more than 2 hours, discard perishable dairy such as cultured cream. Do not taste it to decide — when in doubt, throw it out.

Common Mistakes When Storing Cultured Cream

Leaving the container open or on the counter for long periods shortens shelf life and invites contamination. Storing it in the door or in an overstuffed fridge exposes it to warmer, fluctuating temperatures. Ignoring the use-by date or the 1–2 week rule after opening raises the risk of spoilage. Using a dirty spoon or letting moisture into the container can introduce bacteria or mold. Always use a clean utensil and keep the lid on when the product is not in use.

Frequently Asked Questions

How long does cultured cream last in the fridge after opening?

About 1 to 2 weeks when stored at 40°F or below in a closed container toward the back of the fridge. Follow the use-by date if it is sooner.

How long does crème fraîche last in the refrigerator?

The same as other cultured creams: roughly 1–2 weeks after opening at 40°F or below. Before opening, go by the printed use-by or best-by date.

Can you freeze cultured cream or crème fraîche?

Yes, but the texture may separate or turn grainy. Use thawed cultured cream in cooked dishes such as sauces and soups, thaw it in the fridge, and use it within a few days.

Is cultured cream the same as sour cream?

No. Both are cultured, but crème fraîche and similar cultured creams have a higher fat content and resist curdling when heated, while sour cream has less fat and can break when boiled. Both keep about 1–2 weeks after opening.

Does cultured cream spoil faster than regular cream?

Fermentation makes cultured cream slightly acidic, which slows some spoilage, so it often lasts a little longer than plain cream once opened. It is still dairy, though — use it within 1–2 weeks and keep it at 40°F or below.

Is it normal for cultured cream to separate?

A little liquid on top is normal and can be stirred back in. Discard the product if the separation is excessive or if it smells off, shows mold, or looks lumpy or discolored.

How can you tell if cultured cream has gone bad?

Throw it out if it has an off or sour smell beyond its usual tang, shows mold of any color, or looks or feels wrong. Do not taste it to check — when in doubt, throw it out.

What temperature should cultured cream be stored at?

40°F (4°C) or below. Use an appliance thermometer to confirm your fridge holds that temperature, and store the container in the main body of the fridge rather than the door.