Place yogurt, bananas, nuts, cookies and vanilla in your blender. Blend on high speed for a few minutes, until the mixture is thick but smooth. It will be somewhat icy.

Taste and add more vanilla, nuts or cookies if desired. If the smoothie is too thick, you can add some milk (or even water) to thin it out.

To serve, pour smoothie into glasses or bowls, top with hemp hearts and, if desired, more nuts and cookies.