Prep your bananas: Peel and slice ripe bananas, then freeze them in a single layer for at least 2 hours or overnight.
Frozen bananas are key for that thick, creamy texture.
Add ingredients to the blender: Place the frozen banana slices, cocoa powder, and 1 cup of milk into your blender.
Blend until smooth: Start on low speed, then increase to high. Blend until the mixture is creamy and no banana chunks remain, about 30–60 seconds depending on your blender.
Adjust texture and taste: If it’s too thick, add more milk a splash at a time. If you’d like it sweeter, add a little maple syrup or honey and blend again.
Serve immediately: Pour into a chilled glass.
For a fun finish, dust with a pinch of cocoa powder or add a few banana slices on top.