Add milk, ice, espresso (if using), peanut butter, chocolate syrup, sugar, ice cream (optional), and vanilla extract to a blender.
Blend until smooth and thick.
Drizzle chocolate and peanut butter syrup inside your glass (optional).
Pour the frappuccino into the glass.
Top with whipped cream, crushed Reese’s, and any other toppings you like.
Serve immediately with a straw and enjoy! 😋🥤