Add the rolled oats to a blender to ensure they are finely ground for a smoother texture.

Peel the ripe banana and add it to the blender along with the ground oats.

Add the peanut butter and unsweetened almond milk to the blender.

If you prefer a sweeter smoothie, add honey or maple syrup, followed by the vanilla extract.

Add the ice cubes to the blender for a chilled and refreshing texture.

Blend all the ingredients until smooth and creamy, ensuring no lumps remain.

Pour the smoothie into a glass and serve immediately. Optionally, garnish with a sprinkle of oats or a drizzle of peanut butter.