Step 1: Blend the Base
Add the milk, heavy cream, ice cubes, chocolate sandwich cookies, chocolate syrup, sugar, and vanilla extract to a blender.
Blend on high speed until smooth and creamy, ensuring the cookies are fully crushed.
Step 2: Check Consistency
If the mixture is too thick, add a splash of milk and blend again.
For a thicker frappuccino, add more ice or a few frozen milk cubes.
Step 3: Serve
Pour the frappuccino into tall glasses.
Top with a generous swirl of whipped cream, crushed cookies, and a drizzle of chocolate syrup.