For the powdered sugar glaze: Combine the powdered sugar, milk and vanilla in a medium bowl and whisk until smooth.
For the pancakes: Break up the banana into several large chunks in a bowl. Mash with a fork until smooth and no large lumps remain. (You should have 1/3 to 1/2 cup mashed banana.) Add the brown sugar, cinnamon, vanilla, baking powder and salt and stir to combine.
Whisk together the eggs in a small bowl until smooth. Pour the eggs over the banana mixture and stir to combine.
Heat a large nonstick skillet over medium-high heat. Melt a little butter in the skillet to prevent sticking and heat until the butter begins to bubble. (Your skillet should be hot but not smoking in order for the pancakes to keep their shape.)
Drop 2 dollops of batter (about 2 tablespoons each) onto the skillet and cook the pancakes until bubbles begin to form around the edges and the bottoms are browned and golden, about 1 minute. Flip the pancakes and cook the other side until the edges are browned, another minute or so. Transfer the pancakes to a serving plate. Continue making pancakes with the rest of the batter.
Serve the pancakes warm with candied nuts, chocolate chips and a drizzle of the powdered sugar glaze.