Combine the frozen banana, protein powder, rolled oats, almond milk, almond butter, cinnamon, vanilla extract, and sea salt in a high-speed blender jar.

Add ice cubes to the blender to achieve the desired chilled consistency.

Secure the lid and process on high speed for 60 seconds or until the oats are fully pulverized and the mixture is emulsified.

Taste and adjust seasoning if necessary, then pour into a chilled glass.

Serve immediately to maintain optimal texture and temperature.