"Unsweetened cocoa" refers to cocoa powder that does not contain any added sugar or sweeteners. It is pure cocoa made from grinding roasted cacao beans, which is used to make chocolate desserts and beverages. Full definition
Instead melted butter is used and 1/3 cup unsweetened cocoa powder. (atreatsaffair.com)
Then add 1/4 cup potato starch, 1/4 cup unsweetened cocoa powder, 1/4 teaspoon salt and 1 teaspoon pure vanilla extract and mix well. (glutenfreenosh.com)
Then sift in 1 tablespoon of unsweetened cocoa powder. (eugeniekitchen.com)