Pre-heat oven to 325 degrees F.
Grease donut pans using spray or brush on cooking oil.
In a large bowl, add applesauce, yogurt, and sugars and mix well.
Add melted butter, eggs, and vanilla extract and once again, mix well.
Add flour, baking powder, baking soda, cinnamon, salt and protein powder, ground flax seed, and wheat germ if using. Mix until just blended. Do not over mix.
Spoon batter into the large piping bag or take a ziplock bag, cut out a 1/2" corner for a makeshift piping bag. Once full, roll up end or seal shut and start piping batter into prepared donut pans.
Bake 12-15 minutes. Remove from pan and cool completely.
Meanwhile, in a smaller bowl, preferably with a bottom just big enough for one donut, add powdered sugar.
Slowly add half of milk while mixing well. Keep adding milk until you reach the consistency a little thinner than Elmer's glue.
Once donuts are completely cooled, dip top half into the icing and place on a pan or baking rack.
Eat immediately if you don't mind messy or let the icing set for about 20 minutes.
Enjoy!