Purple sweet potato is a popular ingredient in Asian cuisine, known for its vibrant color and unique flavor. One delicious way to enjoy this ingredient is by making a purple sweet potato Swiss roll cake. This dessert combines the soft and fluffy texture of a Swiss roll with the earthy and sweet taste of purple sweet potatoes.

To make this cake, start by steaming the purple sweet potatoes until they are soft and easy to mash. Mash them into a smooth puree and set aside. In a separate bowl, whisk together eggs, sugar, and flour until well combined. Gently fold in the purple sweet potato puree, being careful not to overmix. Pour the batter onto a lined baking tray and spread it out evenly.