To keep chocolate from spoiling, store it in a cool, dark cupboard at 18–20°C / 64–68°F. At this temperature, the cocoa butter stays solid, helping prevent the familiar white film from forming on the surface. Chocolate readily absorbs strong odors; if stored near onions, spices, or cleaning products, it can lose its own aroma and pick up theirs. Its original packaging or an airtight container provides sufficient protection. When handling chocolate, note that a thin film of oil from your fingers can eventually leave a slight mark. Use a clean, dry knife when cutting a large bar to prevent these marks.
Can You Freeze Chocolate?
Chocolate can be frozen, which may extend its shelf life up to 2 years. However, let it warm slowly to room temperature as it thaws; otherwise, moisture may condense on the surface and cause sugar bloom. Frozen chocolate can also be grated directly into cake or pastry fillings. Freezing is not commonly used, but it is an option when you buy a large amount or do not plan to use the chocolate for a long time.
What Is the White Film on Chocolate?
When chocolate is kept in a warm place, cocoa butter can rise to the surface and crystallize as a whitish, dull film as it cools. This is called fat bloom. When chocolate is stored in a damp environment, sugar can rise to the surface and crystallize, causing sugar bloom, which gives the chocolate a grainy texture. In the two cases, the flavor is largely unchanged; only the appearance and texture are affected, so bloomed chocolate does not have to be discarded.
Is It a Good Idea to Store Chocolate in the Refrigerator?
The refrigerator is not ideal for chocolate because it is humid and chocolate readily absorbs odors from other foods. If necessary, place the chocolate in an airtight container before refrigerating it, then let it return to room temperature before eating. Otherwise, moisture may condense on the surface and cause sugar bloom. In summer, if you do not have a cool cupboard at home, the refrigerator can be a temporary solution. In that case, leave the chocolate in its container for at least half an hour before opening it so condensation stays on the outside of the container.
Does Shelf Life Vary by Type of Chocolate?
Dark chocolate can keep for close to a year at room temperature because it has a high cocoa content and contains no milk fat. Milk and white chocolate contain milk fat and generally begin to lose their aroma sooner, usually within 8–10 months, so use them sooner. Chocolates filled with nuts, dried fruit, or cookies have the shortest shelf life. The filling usually goes stale before the chocolate does, so these products are best used within a few months.
Keep chocolate in a cool, dark place away from odors to preserve its freshness. Refrigerate it only in hot weather and in a tightly sealed container. Bloomed chocolate can be eaten safely, though fresh chocolate gives better results in recipes that require melting. For long-term storage, freezing is the best way to preserve quality.