Frozen Coffee Cooler

A recipe from Nikki.
recipe source: Southern Living Everyday Grilling Cookbook

6 cups ice cubes
4 cups brewed coffee, cooled
1 cup coffee liqueur
3/4 sugar
1 tsp ground cinnamon
1 cup half-and-half or milk
Garnished:whipped cream, ground cinnamon

-Process half of first 5 ingredients in a blender until smooth. Pour coffee mixture into a large pitcher. Repeat with remaining half of first 5 ingredients, and pour into pitcher.
- Stir half-and-half into coffee mixture, and garnish, if desired. Serve immediately. Yield: about 8 cups.

I omit the coffee liqueur, but you can make it according to your tastes. I also cut the recipe in half.