First, gather all your smoothie base ingredients. Combine the two frozen bananas, unsweetened cocoa powder, Greek yogurt, unsweetened almond milk, almond butter, vanilla extract, and a pinch of salt in a high-speed blender. Blend everything until the mixture is completely smooth and creamy.
Once blended, pour the thick chocolate-banana smoothie into your favorite serving bowl. The consistency should be similar to soft-serve ice cream. If it's too thick, you can add a splash more almond milk, but be careful not to make it too thin.
For a beautiful presentation, add a dollop of extra Greek yogurt on top of the smoothie. Use a toothpick or the tip of a knife to gently swirl the yogurt into the chocolate base. This creates an attractive marbled effect that makes the bowl look as good as it tastes.
Now for the fun part: the toppings! Artfully arrange the sliced fresh banana, dark chocolate chunks, and crunchy granola over the top. If you have some fresh mint leaves, add a few for a pop of color and fresh aroma. Serve immediately to enjoy the best creamy texture.