Beverages, Cocoa mix, powder: serving (3 heaping tsp or 1 envelope) to Grams
Quick answer
One serving (3 heaping tsp or 1 envelope) of beverages, cocoa mix, powder weighs 28 grams.
1 serving (3 heaping tsp or 1 envelope)28 g
Reference serving (nutrition facts)100 g
Source: USDA FoodData Central - SR Legacy (2018-04) (USDA household portion weight)