How long does Cereal, dry mixes last in the pantry once opened?
Turning the range into a date
Cereal, dry mixes keeps 1 month in the pantry once opened. Two clocks run on this item: one from the day it went into storage and one from the day the seal broke. Both are listed below, 1 row in all.
- Once opened · in the pantryUse by1 month after the day you opened it
The edge of its own category
Nothing else the USDA lists under Baby Food keeps longer outside the freezer. This item holds 1 month, while the next one down, Jars or pouches, manages 3 days. That is the gap at the top of a list of 6. It stands 1 of 6 on its shelf, one step above Jars or pouches at 3 days. Mix in the source list is this same food.
Every storage figure the USDA publishes for this item
The USDA rates this item in the pantry and nowhere else, one of 84 foods of the 466 it files that way.
- Once opened · in the pantry1 month
What the USDA adds in words
The USDA attaches 1 handling note to this item, reproduced below word for word. It is about safety rather than quality, which is the distinction this data is easiest to get wrong. These are the source's own sentences, not ours, and they are the part of the FoodKeeper record that a table of durations cannot carry.
In the pantry. Should be discarded after use-by date.
Is it still safe to eat, or just past its best?
The answer at the top of this page reads 1 month in the pantry once opened. The USDA rating this place at all is the USDA saying Cereal, dry mixes keeps there, so the figure rates how good it will be. Past it, whether it has gone bad is yours to judge by look and smell: this window rates quality, not the day it turns hazardous.
Every figure assumes the food was sound when you stored it, that your refrigerator holds 40 °F or below and your freezer 0 °F or below, and that the package was handled normally.
It is past the date. Now what?
Say the calculator above puts Cereal, dry mixes past its 1 month in the pantry once opened window. Past that the calendar stops deciding and the food itself does. Mold, a slimy or sticky surface, soft or darkened spots, or a sour smell mean it goes out whatever the date says.
The FoodKeeper entry this page is built from prints storage times and nothing else, so anything past them here is USDA and FSIS guidance rather than a figure from the source. The whole rule, including the cases the source does not cover, is set out under what to do when the date has passed.
Is that a long time?
Nothing the USDA files under Baby Food keeps longer outside the freezer than this item: 1 month. Next is Jars or pouches at 3 days, and the middle of the 6-item list sits at 2 days. Among the 244 foods the USDA also gives a pantry figure, it keeps longer than 21% of them.
Items that behave the same way
Every one of the 3 nearest items keeps the same or less, 1 day to 3 days against the 1 month of this item, which makes it the durable end of the cluster.
Products the USDA rates in the same places
Only 3 other products in the whole file carry the same set of rated places as this one, pantry after opening: Pectin, Cocoa and cocoa mixes and Sugar. That is 3 products out of 466, which makes this a rare shape of record rather than a common one, and it is worth knowing that the comparison below is drawn from a very small group. Of the 3 shown, 2 keep longer than this one. The longest-keeping of them is Sugar at 24 months. Counted more loosely, by which of the three places are rated at all, 84 products match this one.
- Pectin1 month in the pantry once opened
- Cocoa and cocoa mixes1 year in the pantry once opened
- Sugar18 months in the pantry once openedgranulated
Closest by shape, but not an exact match — they share most of these places, not all of them.
- Formula1 day in the fridge once opened
- Jars or pouches2 days in the fridge once opened
- Fruit3 days in the fridge once opened
- Dinners2 days in the fridge once opened
- Liquid concentrate or ready-to-feed formula2 days in the fridge once opened
The rest of the Baby Food shelf
Nothing else on the Baby Food shelf keeps longer outside the freezer than this one. The other 5 products there run down from Jars or pouches at 3 days to Formula at 1 day, and the ones nearest this product by window are Jars or pouches, Fruit and Dinners. That makes this page the top of its own shelf rather than a middle entry. Across the whole of Baby Food the same product ranks 1 of 6. The middle of the shelf is Dinners, at 2 days.
- Jars or pouches3 days2 days in the fridge once opened
- Fruit3 days3 days in the fridge once opened
- Dinners2 days2 days in the fridge once opened
- Liquid concentrate or ready-to-feed formula2 days2 days in the fridge once opened
- Formula1 day1 day in the fridge once opened
If it has to keep longer than this
Nothing the USDA files under Baby Food keeps at least twice as long as this one outside the freezer. It runs the other way: 5 entries in the category keep half as long or less, among them Jars or pouches, Fruit and Dinners. So the question this page answers is not what to buy instead, but what this product outlasts on the same shelf, and by how much. Twice as long is the cutoff used here, so a product a few days apart from this one is not treated as a step.
- Jars or pouches3 days2 days in the fridge once opened
- Fruit3 days3 days in the fridge once opened
- Dinners2 days2 days in the fridge once opened
- Liquid concentrate or ready-to-feed formula2 days2 days in the fridge once opened
- Formula1 day1 day in the fridge once opened
The record this page is built from
This page is built from a single FoodKeeper row, record 367 — the source’s own number for it, not a position — one of the 661 rows in the snapshot. That row fills 1 of the nine storage slots with a time, and the binding figure on it is printed by the source in months, which is the unit this page keeps rather than converting it to days. The record carries 1 handling note, quoted on this page word for word. Every figure here comes from one fixed snapshot, USDA FoodKeeper, retrieved 1 September 2026, and is not refreshed page by page.
Where these numbers come from
How long does this food keep in the refrigerator, in the freezer, in the pantry? Can you freeze it, and how much of its shelf life is left once the package is open? Every answer on this page is the USDA’s own published figure, one of the 9 it keeps per food, and never an estimate of ours.
Every range on this page is published by the USDA FoodKeeper and reproduced unchanged. The multipliers, the rankings, the percentages and the dates are ours, computed from those ranges. Where the source gives a span such as 3 to 5 weeks, comparisons use the upper figure, and the full span is always printed.
Rankings cover only the items the USDA gives a usable figure for, and identical ranges share a place rather than being ordered arbitrarily. Neighbors are chosen by nearest storage time within the same category, never alphabetically: two foods filed next to each other by name usually have nothing to do with each other. The freezer is excluded from ranking because it flattens almost everything.
Where the USDA lists several kinds under one name, they share one page here and every kind keeps its own windows: the source prints them as separate rows, and a page that merged them would be inventing a figure the source never published. Comparisons and the place in the category are computed for the kind the plain name means — the shell egg for eggs, the can for tuna — which is settled name by name rather than by the order the source lists its rows in, and the page names it. Where the plain name means no single kind, the page prints no single figure at all and lists the kinds instead.
Source: USDA FoodKeeper, retrieved 1 September 2026. This site computes every comparison on this page and takes responsibility for it. Found a figure that does not match the source? Tell us on the contact page, with the page and the row — the parsing is mechanical, so a mismatch is our bug and we want it. How the whole site is built, which figures are ours and where the source can be checked is on the method page.
USDA index terms: Cereal, dry, dry mixes, mix, mixes
KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Whether a given window is a safety limit or a quality window is stated on the page that prints it.