Pre heat oven to 350F (180C). Grease and flour a 9 inch (23 cm) Bundt / Tube Pan.
Sift together the flour (corn starch if substituting), cocoa, baking powder, baking soda and salt. Set aside.
In a small bowl mix together the yogurt and milk. Set aside.
In a large bowl beat together the egg and yolks, sugar, vanilla and sugar until light approximately 5 minutes, then slowly add the oil and beat to combine. Alternately add the dry ingredients with the yogurt/milk mixture. Beat to combine 1 minute.
Pour the batter into the prepared pan, sprinkle with chocolate chips (mixed with 1 teaspoon of flour) and bake for approximately 35-40 minutes or until toothpick comes out clean. Let cool 15-20 minutes in the pan then move to a wire rack to cool completely. Dust with powdered sugar if desired before serving. Enjoy!
Notes
You can substitute with Greek yogurt but use only ¼ cup (60 grams) + an extra tablespoon of milk.For room temperature ingredients remove them from the fridge 45-60 minutes before using.Store leftover chocolate bundt cake in an airtight container or well wrapped at room temperature for 4-5 days. To prevent freezer burn, wrap cake in plastic wrap then foil and freeze for one month. Thaw wrapped at room temperature before serving.