8 C. Hot, strong brewed coffee, divided

1/2 C. Sugar

1/4 C. Cocoa

1 tsp. Ground cinnamon

1 T. Vanilla extract

4 C. Half-and-half

Whisk together 1 C. coffee and next 4 ingredients in a large heavy saucepan. Cook over medium heat, whisking constantly, 4 to 5 minutes or until smooth and slightly thickened. Gradually add half-and-half; cook, whisking constantly, 4 to 5 minutes or until thoroughly heated (do not boil). Process half of mixture in a blender 1 to 2 minutes or until frothy. Pour 3 1/2 C. coffee into a 2-quart pitcher; add half of frothy coffee mixture. Repeat procedure with remaining ingredients. Serve immediately, or chill and serve over ice, if desired. Yield: about 12 C