Eggnog Hummers

In blender, purée 1-1/2 cups vanilla ice cream, 1 cup alcohol-infused eggnog and 3 tablespoons coffee-flavored liqueur such as Kahlúa® on high until smooth. Makes about 3-1/4 cups. Pour into 2 (16-ounce) glasses; top with 1/2 cup whipped topping and 1/8 teaspoon ground cinnamon.