Allow frozen bananas to sit at room temperature for 2–3 minutes if blender isn't high-speed.
Add bananas, Greek yogurt, almond butter, ground cinnamon, vanilla extract, and maple syrup or date to the blender.
Start blending and gradually add almond milk until mixture is thick, smooth, and scoopable. Scrape sides as needed.
Taste and adjust sweetness or spice by adding more maple syrup or cinnamon if desired.
Spoon smoothie into a bowl and smooth the top to create a shallow spiral pattern using the back of a spoon.
In a small bowl, mix a spoonful of Greek yogurt with maple syrup or softened cream cheese and swirl on top using a spoon or piping bag.
Add preferred toppings such as crushed graham crackers, chopped dates, granola, cinnamon, or maple syrup drizzle.
Serve immediately for a soft texture or refrigerate 5–10 minutes for a firmer consistency.