Steps
1. In a blender, combine the chocolate ice cream, milk, peanut butter, and chocolate syrup.
2. Blend on high until smooth and creamy.
3. Taste and adjust the sweetness if desired by adding more chocolate syrup.
4. Pour the shake into a glass and top with whipped cream.
5. Garnish with chocolate shavings for an extra treat.
6. Serve immediately with a straw or spoon.