Fudge is mostly sugar, so it keeps well, but not forever: it dries out and hardens at the edges, it can turn grainy as the sugar recrystallizes, and its butter and cream slowly go stale. Wrapped tight and boxed, fudge keeps for weeks; a slab left open on the counter dries in days. Frozen, well wrapped, it keeps for months. In the example below, a Michigan fudge shop's wrapped slabs passed every test through day 28, and they say best by 21 days, a 25% margin. Below is what ends fudge's shelf life, how storage changes it, the study, the date on the label, and a free template.
The short version
- Fudge dries out, turns grainy and its butter goes stale.
- Wrap it tight, then box it.
- A slab open on the counter dries in days.
- Freeze it well wrapped for months.
- Run a real-time study and leave a margin before the date.
- The date is a best-by: quality, not safety.
- TaroStack gives every batch its date from the shelf life you set. More below.
What ends its shelf life
| What ends it | What happens | What slows it |
|---|---|---|
| Drying out | Edges harden; the slab loses weight | Wrap tight in film, then box |
| Graininess | Sugar recrystallizes into a sandy texture | Cook to temperature; corn syrup in the recipe; steady storage temperature |
| Stale butter and cream | Flavor flattens | Fresh dairy; cool storage |
| Picking up smells | Takes on odors from the room or the fridge | Sealed wrap; store away from strong smells |
How cooking temperature sets the texture is in how to make fudge in bulk, and the boxes in how to package fudge for sale.
How it's stored
| Stored | In the example's tests | On the label |
|---|---|---|
| Wrapped in film and boxed, room temperature | Passed every test through day 28 | Best by 3 weeks |
| Wrapped airtight and frozen | Passed after 3 months frozen and 2 weeks thawed | "Freeze for longer storage" |
| Open slab on the shop counter | Dry at the edges by day 3 | Display slabs cut fresh every few days |
The shop counter is the hardest place for fudge; the display slab is cut and wrapped for customers, and a fresh one goes out every few days.
An example: a shelf life study
Straits Fudge Kitchen, the made-up fudge shop in Mackinaw City, Michigan, I use in these examples, wrapped and boxed half-pound slabs from one cook, kept them on a shelf at room temperature, and opened two at each pull:
| Test | Pass if | Day 0 | Day 7 | Day 14 | Day 21 | Day 28 | Day 42 |
|---|---|---|---|---|---|---|---|
| Texture score, 1 to 9 | at least 6 | 9 | 9 | 8 | 7 | 6 | 5 |
| Taste score, 1 to 9 | at least 6 | 9 | 9 | 8 | 8 | 7 | 6 |
| Graininess, 1 to 5 | at most 2 | 1 | 1 | 1 | 2 | 2 | 3 |
| Weight lost, % | at most 4 | 0 | 1 | 1.8 | 2.6 | 3.5 | 5.2 |
| All pass? | Pass | Pass | Pass | Pass | Pass | Fail |
Everything passed through day 28; at day 42 the texture fell below 6, the graininess rose and the slabs had lost more than 4% of their weight. Taking a 25% margin off day 28 gives 21 days, three weeks. How the pulls and margin are planned is in shelf life testing.
The date on the label
Fudge's date is a quality date: "Best by" or "Best if used by". In California, food made from July 1, 2026 that shows a date uses "BEST if Used by" for quality, in sell by date law, and how to write the date is in best by date format.
Get the template
Download the fudge shelf life study template. One sheet: the product, the lot tested, the day it was made, how it's stored and the margin to leave; then each test with its limit and the result at each pull. It marks each pull pass or fail, finds the last day everything passed, takes the margin off, and gives the shelf life for the label and the date for a batch made today. It's an ordinary Excel file with no macros, and it works in Google Sheets, LibreOffice and Numbers.
Where this stops working
The study gives one date for one fudge. Six flavors, cooks every day of the season, slabs in the shop, boxes at a gift shop, and a freezer of holiday stock: someone has to date each cook and send the oldest boxes first.
How TaroStack does it
TaroStack gives every batch its date from the shelf life you set, and sends the oldest out first.
Dates from the shelf life. Each fudge carries its shelf life in days, and each batch's lot gets its production date and the date that follows from it.
First-expired-first-out. Orders take the oldest lots first by default, and a gift shop can be set to take only stock with enough days left.
What's coming up. A forecast shows what will expire unsold and what it costs, and anything thrown out is recorded with its reason, expired or spoiled, so waste shows by item.
| The job | Spreadsheet | In TaroStack |
|---|---|---|
| The date on a batch | Worked out by hand | From the shelf life, on the lot |
| Which batch goes out first | Dates on tape | First-expired-first-out |
| Stock with enough days for a gift shop | Checked by hand | The customer's shelf-life rule |
| What expired last month | Not counted | Waste by reason |
Lots, dates, first-expired-first-out and the expiry forecast are on every plan, from $49 a month. The first 30 days are free, with no credit card. If you'd like a hand setting up, ask, and we'll do it with you.