Step 1

Preheat the oven to 350° F. Heavily grease an 8x8 baking dish and press down a sheet of parchment paper.

Step 2

In a large mixing bowl, beat together Japanese sweet potato, vegan butter, sugar, apple cider vinegar, vanilla and milk.

Step 3

Incorporate flour, baking powder, baking soda and salt. Fold in chocolate chunks.

Step 4

Bake for 27-32 minutes or until the top is golden brown and a tester comes out clean. Let cool in the pan for at least two hours before slicing for cleanest cuts.