Frozen Hot Cocoa

In large saucepan, combine cocoa, sugar and coffee. Add just enough milk to blend into a smooth paste. Add remaining milk and stir over low heat until sugar dissolves. Pour mixture into ice cube trays or 2 shallow pans; cover with plastic wrap and freeze at least 8 hours or overnight. Thaw mixture for 5 to 10 minutes; break into chunks. Place in food processor and blend until smooth. Re-freeze at least 4 hours. Break into chunks and serve in dishes with whipped cream and shaved chocolate, if desired. Makes approximately 12 servings.