""Rich icing for Grandpop's chocolate cake."..."
INGREDIENTS
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3/4 cup butter, softened
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1 (4 ounce) package cream cheese, softened
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1 1/2 (16 ounce) packages confectioners' sugar, or more as needed
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1/4 cup unsweetened cocoa powder
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3 tablespoons strong brewed coffee, or more to taste
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1/2 teaspoon salt