Preheat oven to 350°F. Grease an 8-inch round cake pan and line the bottom with parchment paper.
Add all the ingredients to a high-powered blender and blend until completely smooth, about 1-2 minutes.
Pour the batter into the prepared cake pan and bake for 30-35 minutes, until a toothpick inserted in the center comes out clean.
Allow the cake to cool completely in the pan before inverting onto a serving plate.
