Instructions:

1. Prepare the Ingredients:
   • Start by gathering all the ingredients. If the ice cream is too hard, let it sit at room temperature for a few minutes to soften slightly, making it easier to blend.
2. Blend the Milkshake:
   • In a blender, combine the chocolate ice cream, milk, peanut butter, chocolate syrup, and vanilla extract (if using). Blend until smooth and creamy, ensuring that the peanut butter is fully incorporated into the mixture. If the milkshake is too thick, add a bit more milk and blend again until you reach your desired consistency.
3. Serve the Milkshake:
   • Pour the milkshake into tall glasses. For an extra touch of indulgence, drizzle some chocolate syrup inside the glasses before pouring in the milkshake.
4. Garnish and Enjoy:
   • Top the milkshake with a generous swirl of whipped cream. Garnish with chocolate shavings or pieces of peanut butter cups for added texture and flavor. Serve immediately with a straw and enjoy the rich, creamy goodness of this classic combination.