dutched cocoa powder
In some recipes it may be fine to use regular cocoa powder like Hershey's. But a dutched cocoa powder will usually have more chocolate flavor and fat, so I order dutched cocoa powder online to use. This is one of those ingredients where the type and quality can make a difference. I buy Cacao Barry which is amazing, but only comes in 2# bags. Droste and Guittard are good brands that sometimes can be found in grocery stores.