Ingredients:
1/2 cup unsweetened cocoa powder
1 1/2 cups powdered sugar
5 1/3 tbsp butter, at room temperature
3 tbsp boiling water
Heat the butter and beat chocolate into it
Add salt and boiling water
Beat in cocoa powder until it's a smooth paste
Continue beating until it's the consistency you want. If it's too thick, add a few drops of water. If it's too thin, add more powdered sugar.
Ingredients:
3 1/2 cups powdered sugar
1/2 cup butter, softened at room temp
1/8 tsp salt
1 large egg yolk
1 tbsp sweet milk (optional)
Cream the butter until it's fluffy. Beat in sugar, salt, and yolk until mixture is creamy.
Use the milk only if the mixture needs to be thinned out a bit.
Flavor the mixture. Note from book: Butter cream frostings have a tendency to soften during hot weather. Whip in cornstarch if this happens to bring the mixture back to its...
Dutch 
English
Arabic
French
Spanish
Portuguese
Deutsch
Turkish
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek