01 - Roast or steam the sweet potato until completely tender. Allow to cool, remove skin, and cut into 1-inch chunks.
02 - Place sweet potato chunks, milk, honey or maple syrup if using, and vanilla extract in a blender. Process on high speed until completely smooth and creamy, approximately 1–2 minutes.
03 - Transfer blended mixture to a saucepan. Warm over medium-low heat, stirring frequently, until steaming hot throughout. Avoid bringing to a boil to prevent separation.
04 - Pour hot latte into mugs. Dust with ground cinnamon or nutmeg if desired. Serve immediately while hot.