* Preheat Oven: Preheat your oven to 350°F (175°C). Grease a round or loaf cake pan with olive oil. You can also line the bottom with parchment paper for easier release.

* Prepare Apples: Wash, core, and roughly chop the apples. You don't need to peel them..

* Blend Ingredients: In a blender, combine the chopped apples, eggs, unsweetened cocoa powder, and baking powder. Blend until completely smooth, scraping down the sides as needed. The batter will be relatively thin..

* Bake: Pour the batter into the prepared cake pan. Bake for 40-50 minutes, or until a toothpick inserted into the center comes out clean. The cake might be slightly moist due to the apples, but it shouldn't be wet..

* Cool: Let the cake cool in the pan for 10-15 minutes before transferring it to a wire rack to cool completely.

* Slice and Serve: Slice the cake and serve. It can be enjoyed on its own or with a dollop of yogurt, whipped cream, or a drizzle of honey if you prefer a sweeter taste.