Pour the milk into a microwave-safe container and warm it for about 15 seconds until it’s slightly heated and fragrant.
Add the honey and ground cinnamon to the warm milk, then stir until fully dissolved. The mixture should smell sweet and spicy, with a soft simmering aroma.
Pour the warm, spiced milk into your blender, followed by the peanut butter and sliced banana.
Toss in the frozen ice cubes, which will help chill and thicken the smoothie.
Secure the lid on the blender and blend on high for about 30 seconds, until the mixture is silky, creamy, and uniform in color with no visible chunks.
Pause briefly to check the texture; if it’s too thick, add a splash more warm milk and blend again for a few seconds.
Pour the smoothie into a tall glass, revealing a smooth, velvety surface with a warm, inviting aroma of cinnamon and peanut butter.
If desired, sprinkle a tiny dash of cinnamon on top for extra aroma and presentation.
Allow the smoothie to sit for a minute to settle, then take a moment to enjoy the cozy, fragrant aroma and smooth texture before sipping.