Step 1 of 6
Preheat oven to 325F degrees.
Step 2 of 6
Spray a 9 inch cake pan with extra virgin olive oil, or just grease it with a thin layer of butter.
Step 3 of 6
Dust cocoa powder all over the inside of the pan, tapping to evenly distribute.
Step 4 of 6
Cut a round of parchment paper and line the bottom of the pan, then spray the parchment lightly.
Step 5 of 6
Drain and rinse beans in a strainer. Shake off excess water. Place beans, 3 of the eggs, vanilla, stevia extract, and salt into blender. Blend on high until beans are completely liquified. No lumps! Whisk together cocoa powder, baking powder, and baking soda.
Step 6 of 6
Beat butter with sweetener until light and fluffy.