Preheat oven to 350F and spray a 6 hole donut pan with some cooking spray.
In a bowl whisk the egg and stir in the sugar, mashed banana, milk and vanilla.
Stir in flour, baking powder and cocoa powder then fold in chocolate chips.
Divide batter into the 6 donut holes, they should be filled to the top.
Bake for 16-18 minutes or until baked through, let cool then gently remove from donut pan.
When cool, sprinkle with crumbled freeze-dried berries; dust with powdered sugar