There’s an open container of frosting in the cabinet that’s been sitting there for a few weeks, or a bowl of homemade buttercream from last weekend still sitting in the fridge. Does frosting go bad?
Short answer: Yes, but how fast depends entirely on the type.
An unopened can of store-bought frosting lasts for up to 18 months in the pantry. Homemade cream cheese frosting should be refrigerated immediately and used within two weeks. Buttercream made with just butter and powdered sugar can keep at room temperature for up to two days. The type of frosting determines everything about how you should store it.
For a full overview of how pantry staples and perishable foods compare on shelf life, visit our complete food storage guide.
key takeaways
- Store-bought canned frosting (unopened): Pantry-stable for 12 to 18 months.
- Store-bought canned frosting (opened): Keep in the refrigerator and use within 3 to 4 weeks.
- Homemade American Buttercream (Butter and powdered sugar only): Up to 2 days room temperature; 2 weeks refrigerated; Frozen 3 months.
- cream cheese frosting: Cool immediately. Use within 2 weeks. The FDA 2 hour room temperature rule applies.
- Whipped Cream Frosting: Cool immediately. Use within 1 to 3 days.
- Royal Icing (completely dry): Once set shelf-stable for weeks at room temperature.
How long does frosting last depending on type?
The most important factor in frosting shelf life is whether it contains perishable dairy such as cream cheese, fresh whipped cream or eggs. Those ingredients determine whether the frosting will be refrigerated immediately or can be safely kept for a day or two.
| Frosting Type | room temperature | refrigerator | freezer |
|---|---|---|---|
| Store-bought canned (unopened) | 12 to 18 Month Pantry | no need | up to 3 months |
| Store-Bought Canned (Open) | maximum 2 hours | 3 to 4 weeks | up to 3 months |
| American Buttercream (Butter + Powdered Sugar) | up to 2 days | 2 week | up to 3 months |
| cream cheese frosting | maximum 2 hours | up to 2 weeks | up to 3 months |
| Whipped Cream Frosting | maximum 1 to 2 hours | 1 to 3 days | not recommended |
| Swiss or Italian Meringue Buttercream (egg whites) | 1 to 2 days | up to 1 week | up to 3 months |
| Royal Icing (completely set and dry) | several weeks airtight | Once set up it is not needed | not recommended |
Estimate based on proper storage in sealed airtight containers. Best by dates on commercial products indicate peak quality, not safety cutoffs. Always check for signs of spoilage before using. compatible with usda foodkeeper Guidelines for prepared foods containing dairy.
Store-bought canned frosting: Until the pantry opens, refrigerator after that.
Unopened cans of Betty Crocker, Pillsbury and similar brands are shelf-stable due to high sugar content and preservatives such as potassium sorbate. They can sit in a cool, dark pantry for 12 to 18 months without refrigeration. Once opened the rules change. Exposure to air increases the risk of spoilage and the manufacturer’s recommendation for every major brand is to refrigerate after opening. Loose store-bought frosting keeps in an airtight container in the refrigerator for 3 to 4 weeks. Squeeze tubes of decorating icing are an exception: These can remain in the pantry after opening because refrigeration makes them too hard to pipe.
Homemade Frosting: Type Determines Everything
main difference
American Buttercream (butter and powdered sugar) is the most forgiving. The high sugar content and lack of perishable dairy beyond butter (which is shelf-stable at room temperature for a short period of time) means it can last up to two days in a cool environment at room temperature. America’s Test Kitchen has confirmed that a simple raw buttercream made with just butter, sugar and flavoring can stay stale for a few days. Keep it in the refrigerator for up to two weeks. Freeze it for up to three months.
cream cheese frosting That’s a different story altogether. fda recommends refrigerating any food made with cream cheese after 2 hours, including the time it takes to make it. Cream cheese is a soft dairy product that contains substantial moisture, making it a food safety concern at room temperature. Refrigerate the cream cheese frosting immediately and use within two weeks.
Whipped Cream Frosting Is the most perishable. Fresh whipped cream begins to break down almost immediately at room temperature and should be stored in the refrigerator and consumed within 1 to 3 days.
Signs that frosting has gone bad
when to throw it away
Mould: Any visible fungal growth, which may appear as blurry spots in any color, means discarding the entire container immediately. Don’t try to surround the mold in frosting.
Off or sour smell: Fresh frosting should smell or taste sweet, buttery. Sour, musty, rancid or otherwise unpleasant odors mean the frosting has gone bad. This is especially useful for cream cheese or whipped cream frostings.
Important color changes: Some darkening over time may be normal, but frosting that has turned a completely different color from when it was fresh indicates spoilage.
Separation or granular texture: Some separation may occur in refrigerated frosting and this can be corrected by re-whipping. Frosting that remains grainy or watery even after repeated beating and has been stored for a long time is probably expired.
Tasteless: Rancid butter produces an extremely unpleasant taste. If the frosting tastes sour, bitter, or otherwise wrong, discard it.
Time: Regardless of appearance, discard cream cheese frosting after two weeks in the refrigerator, store-bought frosting after four weeks, and homemade buttercream after two weeks in the refrigerator. Don’t rely on visual inspection alone for cream cheese frosting.
Freezing Frosting: What Works and What Doesn’t
Most frostings freeze well except whipped cream. Buttercream and cream cheese frosting freezes for up to three months. Transfer to an airtight freezer-safe container, press plastic wrap directly onto the surface of the frosting before sealing to prevent freezer burn, and label with type and date. Thaw in the refrigerator overnight and bring to room temperature before whipping again.
Whipped cream frosting does not freeze successfully. The encased air collapses during freezing and thawing, producing a watery, distinct result. Make whipped cream frosting fresh and use it within a few days.
How to Store Frosting Properly
Best Storage Practices
Know the type of frosting you have before deciding where to store it. Refrigerate the cream cheese and whipped cream frosting immediately. Buttercream can last for a while at room temperature but is best stored in the refrigerator. Store-bought canned frosting is pantry-stable until opened.
See also
Use an airtight container. Frosting easily absorbs surrounding odors, especially in the refrigerator. An airtight container keeps the frosting from tasting like other things in the fridge. Press plastic wrap directly onto surface before sealing to prevent a crust from forming.
Label with type and date. Buttercream and cream cheese frosting look almost identical after stored in one container. A label removes the guesswork about what it is and how long it has been there.
Do not place the tip in the piping bag with the tip cut. An open piping bag allows the frosting to dry faster. Instead transfer unused frosting to a sealed container.
Bring refrigerated frosting to room temperature before using. Cold buttercream is stiff and difficult to spread. Take it out of the refrigerator 30 to 60 minutes before using. Beat again if necessary to restore a smooth, spreadable texture.
Recipes that use frosting
- Sugar-Free Cutout Cookies: Classic royal icing transforms these into iconic decorative cookies perfect for any occasion
- Bunny Butt Cupcakes:Buttercream frosting is added to the fluffy white tails and grass that make up these cupcakes
- Lavender Cookies: A simple glaze icing finishes these delicate cookies with a light, sweet coating
- Unsweetened Sugar Cookies: Decorated with sugar-free icing that works just like royal icing for beautiful cutout results
Frequently Asked Questions
Can I use store bought frosting past its best by date?
For closed boxes, yes, often well beyond that. Best by dates on canned frosting indicate highest quality, not immediate safety cutoff. An unopened can stored properly in a cool, dark pantry that is a few months past its date is almost certainly still fine. Check for odor, mold, or significant changes in texture. If it looks and smells normal, it is safe to use. For loose frosting that has been refrigerated, use the smell and mold test rather than the date as your primary guide, and discard it after four weeks.
Does frosted cake need to be refrigerated?
It depends on the frosting. Cakes made with American buttercream (butter and powdered sugar) can be stored covered at room temperature in a refrigerated container for up to two days. Cakes frosted with cream cheese frosting should be refrigerated and brought back to room temperature before serving. Cakes with whipped cream frosting should be refrigerated and served within a day or two. When refrigerating a frosted cake, cover it loosely so the frosting doesn’t absorb refrigerator odors and to keep the cake from drying out.
My buttercream frosting has been in the fridge for three weeks. Is it still good?
If it’s a plain American buttercream made with just butter and powdered sugar, it’s probably borderline. The recommended refrigerator window for best quality is two weeks. Test the smell and taste. If it smells fresh and buttery rather than stale and tastes normal, it is still usable. If there is any odor or taste, remove it. If the buttercream contains cream cheese, milk or eggs, discard it after three weeks without questions.
Further reading
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