Given the task definition and input, reply with output. In this task, you have to generate the named entities (NER) given its ingredients of the recipe. Named entities are the names of the items without their quantity.

butter, black cocoa, Cake:, 2 cups flour, 1/3 cup unsweetened cocoa, 1/3 cup black cocoa [available from specialty retailers], 1 1/4 teaspoons baking soda, 1/4 teaspoon baking powder, 3 eggs, 1 2/3 cups sugar, 1 teaspoon vanilla, 1 cup Hellmann's/Best Foods mayonnaise, 1 1/3 cups fresh cold water, Buttercream frosting:, 2 cups butter, softened, 1 cup heavy whipping cream, 1 cup confectioners' sugar, 1/3 cup black cocoa, 1/4 cup dutch process cocoa, In a large bowl, Whip the butter on high speed, occasionally scraping down the sides of the bowl., Whip until double in volume. This takes a very long time, approximately 10 minutes., While still whipping, drizzle in the heavy cream., Continue whipping until the mixture is stiff, approximately 2 to 4 minutes., In a medium bowl, carefully combine, with a whisk, the confectioners' sugar, the black cocoa, , and the dutch process cocoa. Add 1/2 of the confectioners' sugar mixture to the butter and cream mixture and whip until smooth. At this point, you can taste the frosting and determine, if you would like to add more of the sugar mixture to sweeten to taste.

butter, black cocoa, flour, unsweetened cocoa, black cocoa, baking soda, baking powder, eggs, sugar, vanilla, mayonnaise, fresh cold water, Buttercream frosting, butter, heavy whipping cream, sugar, black cocoa, dutch, bowl, time, While still whipping, minutes, bowl, cocoa, would