Preheat oven to 350 degrees. Grease and flour a 9 inch cake pan.
In a large bowl, beat the eggs, egg yolk and sugar until creamy and light.
Add the vanilla and the ricotta cheese and beat to combine. Set aside.
In a medium bowl, whisk together the flour, salt and baking powder. Add the dry ingredients to the wet ingredients and combine.
Fold in the mini chocolate chips.
Pour the batter into the prepared pan and place in the oven.
Bake for 30-40 minutes or until a toothpick comes out clean from the middle.
Cool and remove from the pan. Slice and enjoy.