1 - In small bowl, combine cocoa and boiling water, stirring until smooth. In large bowl, with mixer at medium-high speed, beat butter and confectioners sugar for 5 minutes or until fluffy. Reduce speed to medium-low; add melted chocolate, then cocoa mixture, beating until smooth and occasionally scraping bowl with rubber spatula. If frosting is too runny, refrigerate until just stiff enough to spread.
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