Frozen blackberries without sugar have 64 kcal per 100 g. Slightly higher in sugar than fresh (10.7 vs 4.9 g) due to concentration during blanching. Weigh frozen — they lose water as they thaw.
How should I track Blackberries, frozen, unsweetened?
Blackberries, frozen, unsweetened is a good source of fiber. When tracking Blackberries, frozen, unsweetened, weigh the edible portion — after peeling, coring, or removing seeds. The part you throw away does not count, but it can make up 20–40% of the total weight depending on the fruit. A systematic review (Whitton et al., Adv Nutr 2022) found that fruits are among the most commonly misestimated food groups. One more thing to watch: fresh and dried versions have very different calorie density. A handful of dried fruit can have the same calories as a whole bowl of fresh — always double-check which form you are logging.