In a small saucepan, combine the oat milk, ground cinnamon, honey, and vanilla extract. Heat for a few minutes over medium heat until it reaches your desired level of warmth. Stir occasionally.
Prepare the espresso and pour it into your favorite mug.
Use a handheld milk frother to give the steamed milk a quick froth before pouring it into your mug.
Finish with a dash of cinnamon on top and enjoy!
