Preheat oven to 350 F. In a large bowl add the oat flour, tapioca starch, baking powder, baking soda, and sea salt. Whisk together to combine and set aside.
1 ½ cup oat flour, ¼ cup tapioca starch, 2 teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon sea salt
In a separate mixing bowl or in the bowl of a stand mixer, beat together the egg, egg white, and coconut sugar until well mixed. Add the coconut oil, milk, apple cider vinegar, and vanilla extract to the bowl and mix again until combined.
1 egg, 1 egg white, ⅔ cup coconut sugar, ⅓ cup coconut oil, ½ cup milk of choice, 1 tablespoon apple cider vinegar, ½ tablespoon vanilla extract
Slowly add the flour mixture into the bowl while mixing. Be careful not to overmix.
Pour the batter into a greased 8x8 inch cake pan lined with parchment paper. Bake in the oven for 25 - 28 minutes until the edges begin to pull away from the sides of the pan. Insert a toothpick into the center of the cake to ensure it’s done. If the batter sticks to the toothpick, the cake needs a few more minutes to bake.
Let the cake cool completely before icing.
To make the icing, first whip the greek yogurt and maple syrup well with a hand or stand mixer until fluffy. You are trying to incorporate air into the yogurt here.
⅓ cup greek yogurt, 2 tablespoon maple syrup
Then melt the chocolate chips either on the stove top (carefully) or in the microwave in 8 second intervals until smooth. Add the melted chocolate to the bowl and mix well to incorporate. Again, you are whipping the chocolate into the yogurt.
½ cup chocolate chips
Once the frosting has reached your desired consistency, spread it on top of the cake with an uneven spatula. Top with fresh fruit, slice, and enjoy!