Super Coffee Cake

Directions

1. 1
   Preheat the oven to 170C.
2. 2
   Prepare the espresso, add the instant coffee, stir to dissolve, and let it cool.
3. 3
   Sift together the flour, potato starch, and baking powder.
4. 4
   Beat the egg yolks with the sugar and a drop of coffee. Add the butter.
5. 5
   Add the sifted flour and gradually add the coffee, stirring to incorporate.
6. 6
   Add the oil and incorporate it completely.
7. 7
   Add the chocolate chips.
8. 8
   Delicately fold in the egg whites.
9. 9
   Pour the batter into a cake pan and bake for 45 to 50 minutes.
10. 10
    Remove the cake from the oven, cool it completely, sprinkle with powdered sugar and serve.