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 is optional depending on preferred texture.
03 - Divide strained frappe between two tall glasses.
04 - Top each glass with whipped cream, extra Cinnamon Toast Crunch cereal, and pinch of ground cinnamon.
05 - Serve immediately with straws while cold.