Brew 1 cup strong coffee or pull espresso shot using an espresso machine or coffee maker (about 3–5 minutes).

In a bowl, mash the ripe banana until smooth (about 1 minute).

Heat the milk in a small saucepan over medium heat until hot and steaming but not boiling (about 3 minutes).

Combine the mashed banana, brewed coffee, brown sugar, ground cinnamon, vanilla extract, and a pinch of salt in a blender.

Blend on medium speed for 30 seconds until the mixture is smooth and frothy.

Froth the hot milk using a milk frother until light and foamy (about 1 minute).

Divide the banana-coffee mixture between two mugs and gently pour the frothed milk over the top.

Sprinkle a pinch of cinnamon on each latte and serve immediately.