Prep the base: Add milk, protein powder, cocoa, vanilla, and salt to the blender first so they mix evenly.
Build the creaminess: Add frozen banana, Greek yogurt, and hazelnuts or hazelnut butter.
Sweeten smartly: Add maple syrup, honey, or dates only if needed. Start with less and adjust after blending.
Blend smooth: Blend on high for 30–45 seconds.
Add ice for thickness and blend again until silky.
Taste and tweak: If it’s too thick, splash in more milk. If you want a stronger chocolate hit, add a little more cocoa.
Serve: Pour into a chilled glass. Top with a sprinkle of crushed hazelnuts or shaved dark chocolate if you want a “truffle” finish.