In a blender, combine ice cream, brandy, and creme de cacao. Add ice cubes. Cover and blend until thoroughly blended.
Pour mixture into eight 1-1/2-to 2-ounce shot glasses. Top each with whipped cream piped through a star tip. Sprinkle lightly with cinnamon. Serve immediately or nest in ice. Makes 8 (1-1/2-ounce) servings.