Preheat oven to 350°F and line two {12 cup} muffin tin with 17 cupcake liners.
Scoop out the flesh of the sweet potato and place in the jar of a blender. Add the avocado, applesauce, milk, vanilla and eggs. Blend on low speed until smooth.
Melt ¾ cup of the chocolate chips and add to the flour mixture. Add the sweet potato mixture and stir until combined. Fold in the remaining ¾ cup chocolate chips.