01 - Roast or steam the Korean sweet potato until completely tender throughout. Allow to cool slightly, then 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 canister. Process on high speed until mixture achieves silky smooth consistency with no visible potato pieces.
03 - Transfer blended mixture to a small saucepan. Warm over medium-low heat, stirring frequently, until steaming hot throughout—approximately 3-5 minutes. Avoid boiling to prevent separation.
04 - Pour hot latte evenly between two heat-resistant mugs. Dust surface with cinnamon or nutmeg if desired. Serve immediately while piping hot.