Coconut sugar

One US cup of coconut sugar weighs between 132 and 154 grams, depending on how the cup is filled and which source measured it. That range is the answer; a single number would not be. Every figure behind it is below, with the method each source used.

Also called coconut sugar, coconut palm sugar, coco sugar, palm sugar, coconut nectar sugar.

Coconut sugar publishes as a range 132 to 154 grams per cup because the two most authoritative baking sources disagree by 17%, well over the 5% sugar tolerance, and the disagreement reflects real product and measurement variance rather than one source being wrong. King Arthur publishes 154 g/cup for the standard state, and America's Test Kitchen publishes 132 g/cup based on their tested recipe conversions (5 1/4 ounces per 1 cup plus 2 tablespoons, from their Coconut-Cashew Muffins Reduced Sugar recipe). Producer data sits in the middle: Bob's Red Mill labels 1 teaspoon at 3 grams which extrapolates to 144 g/cup, and the Aline Made professional baking conversion chart lists 140 g/cup. The 22-gram spread between KA's 154 and ATK's 132 represents the honest span of coconut sugar cup weight across brands, granule sizes, and measurement conventions.

Understanding why coconut sugar varies more than other sugars requires knowing something about how it is made. Coconut sugar is produced by boiling down the sap tapped from coconut palm flower buds until the water evaporates and the remaining sugar-and-mineral concentrate crystallizes. Unlike white sugar, which is refined to nearly pure sucrose with uniform crystal size and near-zero moisture, coconut sugar retains varying amounts of moisture (typically 2 to 6 percent) and comes out with irregular granule sizes depending on the boiling temperature, the humidity during crystallization, and the final drying step. Finer-granule coconut sugar packs denser (closer to 154 g/cup), coarser-granule coconut sugar packs lighter (closer to 132 g/cup), and slightly moister batches pack denser than drier ones. Brands like Madhava, Bob's Red Mill, Nutiva, and Wholesome all produce slightly different granule profiles, and the same brand can vary from batch to batch depending on harvest and processing conditions.

USDA does not publish a cup portion for coconut sugar. The USDA record for the ingredient covers nutritional composition (15 kcal per 4-gram teaspoon, similar to brown sugar) but the record only provides the standardized 1-teaspoon serving size that FDA labeling requires. Commercial retail nutrition labels also use the 1-teaspoon serving convention (Madhava at 4 g/tsp, Bob's Red Mill at 3 g/tsp, Nutiva at 4 g/tsp), which is FDA-standard for sugars rather than measured density and does not directly translate to cup weight.

Compared to other sugars on the site, coconut sugar at 132-154 g/cup sits between granulated white sugar (200 g/cup, very fine uniform crystals packing densely) and loose brown sugar (145-150 g/cup, slightly moist granules packing similarly to coconut sugar). Packed brown sugar at 213 g/cup is much denser because the moist molasses coating fills interstitial gaps when packed firmly. Powdered sugar at 120 g/cup is lighter because the very fine particles trap air. Coconut sugar's density behavior most closely resembles loose brown sugar because both are moist granular sugars with irregular crystal sizes, and this parallel is the physical reason why the two range-publish similarly.

Category assignment is sugar, matching all other granular sweeteners on the site. Coconut sugar is a crystalline particulate solid that packs like other sugars regardless of its coconut origin. The milled category is reserved for powdered plant materials like flours, nut meals, and cocoa powder that behave differently in packing due to fibrous structure. Coconut sugar is unambiguously in sugar.

Confidence is low because the two authoritative sources disagree over tolerance and the ingredient has genuine batch and brand variance. Bakers using King Arthur recipes should trust KA's 154 g/cup figure. Bakers using America's Test Kitchen recipes should trust ATK's 132 g/cup figure. Bakers substituting between recipe traditions or using unfamiliar brands should weigh their coconut sugar rather than trusting a single cup measurement. This entry represents another moat play for the site: no other cup-to-gram reference publishes coconut sugar with dual-authority disambiguation, and the transparent range with KA and ATK both cited is the differentiator.