In a large mixing bowl, whisk together the egg yolks, Greek yogurt, whole milk, sugar, salt, and vanilla extract until smooth and well combined.
In another bowl, whisk together the flour, malted milk powder, and baking powder.
Gradually add the dry mixture to the wet ingredients, stirring gently until just combined. Be careful not to overmix; a few lumps are perfectly fine.
In a separate bowl, beat the egg whites until soft peaks form.
Gently fold the beaten egg whites into the batter until just incorporated.
Fold in the sliced bananas and chocolate chips, distributing them evenly throughout the batter.
Preheat your skillet or griddle over medium heat and add a tablespoon of butter, allowing it to melt and coat the surface.
Pour about ¼ cup of batter onto the skillet for each pancake. Cook until bubbles form on the surface and the edges start to look set, about 2-3 minutes. Flip and cook for an additional 1-2 minutes until golden brown.
Repeat with the remaining batter, adding more butter to the skillet as needed. Serve the pancakes warm, topped with extra banana slices, chocolate chips, or a drizzle of maple syrup for added sweetness.