Prepare donut mix according to bag instructions. Fry and let cool completely. To make filling: use a 1:2 ratio Nutella:Dobash, whisk together and fill donuts. To make glaze: use a 2:3 ratio chocolate flat icing -OR- Fon Dip:Nutella®, whisk together, dip donuts and reserve. Melt dark chocolate ganache and dip shake glass into ganache. When ganache is almost dry, roll in pretzels and reserve in cooler. In a blender, place 4 oz chocolate ice cream (3, 2 oz blue handled scoops), 1 oz Dobash filling, 1 oz Nutella®, 4 oz whole milk, and 0.5 oz Crème de Cacao and blend until no lumps remain. Pour into prepared glass, top with reserved bismark, place a straw through the donut, top with cotton candy or chocolate Velvetop and dark chocolate candy bar. Serve immediately.