In the bowl of a stand mixer, stir the flour, sugar, drink mix powder, cocoa powder, chocolate chips, and baking soda until evenly incorporated.
In separate, medium sized bowl, whisk the vanilla, egg, sour cream, milk, and oil together until the mixture's smooth and completely incorporated.
Pour the wet ingredients into the mixing bowl, and mix on low speed until just combined.
Transfer the batter into a ziplocking bag. Snip off one end, and pipe the batter into the greased and floured donut pan, stopping below the rim to allow for expansion.
Bake at 375 degrees for about 8 minutes, or until a toothpick inserted in the center comes out clean.
Set aside the pan of cooked donuts, and let them cool completely before removing from the pan.
Transfer the cooled donuts to a serving tray. Add a handful of powdered sugar to a sifter and gently shake the sifter out over top of the donuts, until the desired amount of sugar coating has settled.
Serve the donuts with a glass of cold milk and enjoy.