Tart cherry concentrate: why 336 g per cup is wrong
King Arthur Baking Ingredient Weight Chart publishes 336 g (11.9 oz) per US cup of tart cherry concentrate. This site rejects that figure and publishes 316 g (11.1 oz) instead, from FruitSmart, Red Sour Cherry Juice Concentrate specification (BQS0000093, RS-68) (density 1.3337 g/mL, matching the composition of the substance). The reason:
Tart cherry concentrate is sold at 68 °Brix, and at that strength two industry specifications give 1.333 to 1.352 g/mL (FruitSmart 11.13 lb per gallon; Parchem specific gravity 1.335 to 1.354), 315 to 320 g per cup. 1.420 g/mL would need a syrup stronger than 80 °Brix, heavier than the top row of the USDA sucrose table (1.411 g/mL at 80 °Brix). Two tablespoons at 68 °Brix weigh 39.5 g, 1.39 oz; written as 1 1/2 oz and converted back, that becomes 42 g. The same fractional-ounce rounding as King Arthur's jam figure.
The arithmetic
| Source | 1 cup | Density | Status |
|---|---|---|---|
| King Arthur Baking Ingredient Weight Chart | 336 g11.9 oz | 1.4202 g/mL | Rejected on physics |
| FruitSmart, Red Sour Cherry Juice Concentrate specification (BQS0000093, RS-68) | 316 g11.1 oz | 1.3337 g/mL | Published here |
The published figure and its sources
The full sourcing for tart cherry concentrate, including every accepted and rejected figure, the state or filling method behind each, and the physics or standards reasoning applied, is on the ingredient page.
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