One bowl dairy-free chocolate wacky cupcake with easy sweet potato frosting. The cake is made without egg and dairy. It is moist and delicious dark chocolate cake. Dairy-free, egg-free, nut-free.
Bake a large size sweet potato on 400 deg F for 1 hour or until soft when you poke it with a fork. Set aside.
Make three wells on the dry mixture, put vinegar, oil, and vanilla extract on each well.
Pour water on the mixture, use the spatula to mix the batter until all blended.
Bake it in the oven for 22 minutes or until the toothpick comes out clean.