Just eggs, greek yogurt, flour, sugar and baking powder

In a separate clean bowl, beat the egg whites until stiff peaks form. This will help give your cake its light and airy texture.
Combining the Ingredients
Carefully fold the beaten egg whites into the yolk mixture, making sure not to deflate the egg whites. Once combined, gently stir in the chocolate chips for an extra indulgent touch.
Baking the Cake
Preheat your oven to 170°C. Pour the cake batter into a greased baking dish and spread it out evenly. Bake in the preheated oven for about 1 hour, or until the cake is golden brown and a toothpick inserted into the center comes out clean.