Preheat oven to 350°F. Grease mini muffin donut pan with cooking spray.
In a large bowl, whisk together sugar and egg until combined. Add in flour, baking powder, salt and nutmeg. Mix until combined. Then mix in vegetable oil, milk and vanilla extract.
Pipe batter into mini donut pan about 1/2 full.
Bake for 10-12 minutes, until toothpick inserted comes out clean. While donuts are cooling, make the ganache.
Place chopped chocolate in a glass bowl big enough for mixing. Heat heavy cream in a microwave about 40 seconds. Pour hot heavy cream onto chopped chocolate. Stir until mixture is smooth. Carefully remove donuts from baking pan and dip in ganache.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.