01 - Add milk, heavy cream, brewed coffee, cereal, sugar, vanilla extract, cinnamon, and ice cubes to blender. Blend on high speed until smooth and frothy, approximately 1-2 minutes.
02 - Pour blended mixture through fine mesh sieve into large measuring cup to remove cereal pulp. This step ensures smooth texture.
03 - Divide strained frappe between two tall glasses. Top with whipped cream, sprinkle with extra cereal and ground cinnamon. Serve immediately with straws.