Combine eggs, yolks, buttermilk, and melted butter and whisk till combined.
In a separate bowl combine flour, baking soda, baking powder, salt, nutmeg, and sugar. Whisk to combine.
Add wet ingredients to dry ingredients and mix till just combined.
Place in oiled bowl and refrigerate for an hour or until the dough is chilled and easier to handle.
When ready to make the donuts, melt the shortening in a heavy saucepan. Slowly begin to heat up the shortening while you roll and cut out the donuts.
Remove dough from fridge and dump out on to lightly floured surface. Roll out to 1/4 inch thick. Cut small circles of dough, cutting an even smaller circle in the middle for the donut hole.
When shortening reaches 375 degrees F, add about 4 to 5 donuts to oil. Cook for 45 seconds on each side. Remove carefully with slotted spoon and place on plate lined with paper towels.
Before you add more donuts to the shortening, reheat the shortening to 375 degrees. When it has reached 375, repeat the process.
Place cinnamon and sugar in a small bowl and mix till combined. Place powdered sugar in another bowl. Place sprinkles in yet another bowl. In a small saucepan over low heat, melt cream. Add chocolate chips and remove from heat. Keep mixing until chocolate is melted.
While donuts are still warm, dip and toss in cinnamon sugar. Wait to dip donuts in powdered sugar until they are almost cool otherwise the powdered sugar will melt. Dip doughnuts into chocolate glaze and then dunk into the bowl of sprinkles.