Dried blueberries

One US cup of dried blueberries weighs 160 grams. Going the other way, 100 grams is about 0.62 cups.

Also called dried blueberries, sweetened dried blueberries, blueberries dried.

Dried blueberries publish at 160 grams per cup with two authoritative sources in near-exact agreement. USDA SR Legacy record 168158 (Blueberries, dried, sweetened) publishes 40 grams per quarter cup, which extrapolates to 160 g/cup at density 0.6763 g/mL. King Arthur's Ingredient Weight Chart publishes 156 g/cup for the dried state without specifying sweetening, and the 2.6% gap between them fits well inside the 5% sugar tolerance, giving medium confidence in the published figure.

The reason both sources land in the same place despite different labeling assumptions is that most commercial dried blueberries are sweetened. Unlike raisins or dried figs, blueberries are naturally too tart to dry well without added sugar, so retail products from Ocean Spray, Kirkland, and store-brand equivalents all include sugar or fruit-juice concentrate in the drying process. KA's unlabeled 'dried' figure and USDA's explicit 'sweetened' figure are effectively measuring the same product. Bakers using truly unsweetened dried blueberries (rare, usually found at specialty bulk-bin stores) can expect somewhat lower density because unsweetened dried fruit is drier and lighter than the sugar-coated retail version.

Category assignment is sugar rather than milled, following the precedent established for dried-cranberries in S9-S10. The physical rule is that small dried berries roughly the size of a raisin belong in sugar because they behave as small crystalline-or-particulate solids in packing terms, similar to sugars, salts, and chocolate chips. A dried blueberry shrinks from about 1 centimeter fresh to 5-8 millimeters dried, which is close to raisin size, and packs at 156-160 g/cup, near the raisin figure of 149 g/cup and inside the dried-cranberries range of 114-160 g/cup. The larger dried fruits already on the site (dried-apricots at 130, dried-figs at 149, dried-apples at 86, dried-pineapple at 142-160) are in milled because their chunks are meaningfully larger than raisins and their packing is dominated by geometry rather than particulate behavior.

Compared to the fresh version added earlier this session, dried blueberries are slightly denser per cup (160 g dried versus 148 g fresh USDA point figure, or up to 170 g fresh at the top of the KA range). The dried and fresh figures are unusually close because a blueberry shrinks in volume as it dries but does not become dramatically denser: the fruit loses water (about 85% of fresh mass) and gains added sugar, and the shriveled dried berry with sugar coating packs slightly better than a whole plump fresh berry with internal air pockets. This is a different pattern from dried-apples (86 g/cup) versus fresh apple-slices (109 g/cup), where drying dramatically lightens the ingredient because apple flesh retains a puffed cellular structure after water loss. Blueberries collapse rather than puff during drying, so the density difference between fresh and dried is small.

Compared to the other small dried fruits in sugar, dried blueberries sit near the middle of the density band. Raisins loose at 149 g/cup are lighter (grape flesh is denser but raisins retain more air pockets between wrinkles), currants at 142 g/cup are lighter still (smaller pieces, more interstitial air), dried cranberries at 114-160 g/cup range widely because commercial sweetened cranberries vary between different sugar-coating methods, and dried blueberries at 156-160 g/cup are on the denser end because the sweetening syrup fills interstitial space during drying.

Confidence is medium. Two authoritative sources agree to within 2.6% on the standard sweetened product, and the USDA record provides direct portion data derived from a quarter-cup measurement. Bakers should treat 160 g/cup as reliable for standard commercial dried blueberries (Ocean Spray, Craisin-style, most store brands) and expect slightly lower weight per cup for genuinely unsweetened dried product.