01 - Place milk, heavy cream, brewed coffee, cereal, sugar, vanilla extract, cinnamon, and ice cubes in a blender container.
02 - Blend on high speed for 1–2 minutes until completely smooth and frothy, ensuring all cereal pieces are incorporated.
03 - Pour blended mixture through a fine mesh sieve into a large measuring cup or bowl to remove cereal pulp, if a smoother texture is preferred.
04 - Divide the strained frappe evenly between two tall glasses.
05 - Top each glass with whipped cream, sprinkle extra Cinnamon Toast Crunch cereal and ground cinnamon over the cream.
06 - Insert straws into glasses and serve right away while cold and frothy.