Most simple chocolate icing recipes, such as recipes from the Food Network and Allrecipes, call for unsweetened cocoa powder to give the icing its chocolate flavor. In a 2012 taste test, Cook's Illustrated deemed Hershey's Natural Unsweetened Cocoa Powder to be the best supermarket brand, reports BakingBites.com.
Chocolate icing recipes generally call for confectioner's sugar, butter or margarine, milk or heavy cream, vanilla extract and unsweetened cocoa powder. The Cook's Illustrated taste test ranked Droste Cocoa as their second most recommended brand, followed by Hershey's Special Dark Cocoa and Valhrona Cocoa Powder. The Valhrona brand was considered by some testers to be too smoky in flavor, according to BakingBites.com.