Gather all your ingredients. Using a frozen banana is key to achieving a thick, creamy texture without watering down the shake.
Add the liquid first: Pour the almond milk into your blender. This helps the blades move freely and prevents ingredients from sticking.
Next, add the protein powder, frozen banana slices, almond butter, vanilla extract (if using), and any optional seeds or sweeteners.
Finally, add the ice cubes. Start with 4-5, and you can add more if you prefer a colder, thicker shake.
Secure the lid on your blender and blend on high speed until the mixture is completely smooth and creamy. This usually takes about 30-60 seconds, depending on your blender's power.
Pour the protein milkshake into a glass or travel tumbler immediately and enjoy.