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Home > Guides > Shipping chocolate in summer heat
Pack chocolate and candles with insulation and cold packs, ship early in the week so the parcel never sits in a hot warehouse over the weekend, and use the fastest service that makes sense. Tempered chocolate starts to soften around 34 degrees Celsius (93 Fahrenheit), so a summer delivery truck is well past the danger point.
Cocoa butter, the fat that gives chocolate its structure, melts in a narrow range around 34 to 38 degrees Celsius (about 93 to 100 Fahrenheit), with properly tempered eating chocolate starting to soften near the bottom of that range. That is barely above a warm room. A parked delivery truck in July runs far hotter, and a metal mailbox in direct sun is worse. This is a melt-risk problem, not a food-safety one: melted chocolate is still safe to eat, it just arrives as a sad puddle with white streaks.
Candles are more forgiving but not immune. Wax softens, warps, and can sweat fragrance oil in sustained heat, and decorative shapes lose their edges. The same packing approach covers both.
Layer it: product, cold pack, insulation, outer box. Gel cold packs go on all sides of the chocolate, not just underneath, and the whole bundle goes inside an insulated mailer or a box lined with foil bubble insulation. Insulation does not make anything cold; it slows heat getting in, which buys your cold packs time. Think of it as hours of protection, not days.
Use cool packs, not frozen solid ones, for chocolate. A rock-hard frozen pack pressed against a chocolate bar causes condensation as it thaws, and moisture on chocolate causes sugar bloom: the dusty white coating that looks like mold but is just dissolved sugar recrystallizing. Wrap each cold pack in paper so it never touches the product directly. For candles, frozen packs are fine, since a little condensation will not hurt wax.
| Layer | What to use | Common mistake |
|---|---|---|
| Product wrap | Sealed bag around each item | Loose items rattling against cold packs |
| Cold source | Gel packs on all sides, wrapped in paper | Frozen-solid packs touching chocolate directly |
| Insulation | Foil bubble liner or insulated mailer | Assuming insulation alone keeps things cold |
| Outer box | Snug corrugated box, taped well | Oversized box full of warm air |
Monday through Wednesday, and as early in the day as you can. A parcel shipped Thursday can easily spend the weekend sitting in a hot sorting facility or on a truck, which is exactly when cold packs give out. Morning drop-offs catch the day's first processing, shaving hours off the trip. Check the weather at the destination, not just where you are: chocolate shipped from cool Vancouver to a heat-waved Toronto still melts on arrival.
For the service level, faster is genuinely better here, because every extra transit day is another day of heat exposure. In Canada, Xpresspost moves faster than regular parcel, and a LetterAgent label covers it: describe the package to your AI assistant and approve the exact quoted price.
During an extreme heat warning at either end, wait. No reasonable amount of gel packs survives three days above 40 degrees. Tell the recipient when to expect the parcel so it does not bake in their mailbox all afternoon, and consider whether the order can wait for a cooler week. A delayed shipment beats a refund and an angry review about a melted box.
Ready to ship it? Get a shipping label with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and get your label.
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