Preheat oven to 350 degrees F. Grease donut pans with butter or nonstick cooking spray, set aside.
In a large bowl, whisk together the flour, baking powder, baking soda, salt, and nutmeg.
In a medium bowl, whisk together the eggs and sugars until combined. Add the milk, butter, oil, yogurt, and vanilla extract and mix again.
Pour the wet mixture into the dry mixture and fold the ingredients together, just until combined. The batter will be thick and it's ok if there are a few lumps.
Fill donut cavities 3/4 way full by using either a pastry bag/ziplock bag, cut off a corner and pipe the batter into each donut cup. You could also spoon the batter into the donut cups but using a bag will help create a neater look.
Bake for 10-11 minutes, or until a toothpick inserted into the center of donuts comes out clean. Let cool for 5 minutes before transferring to a wire rack.
In the meantime you can make the chocolate glaze, in a microwave safe bowl, add the chocolate chips, milk and vanilla extract. Melt in 30-second intervals, storing in-between each interval until smooth and melted.
Dip each donut in the chocolate glaze, top with sprinkles, and place on cooling rack to set. Enjoy!
It's best to enjoy the donuts the same day since they are so fresh. They will last up to 4 days in the refrigerator or a cool area covered or in an airtight container.