Preheat a skillet, pan, or griddle to medium heat (about 275 degrees). In a medium bowl whisk together flour, sugar, brown sugar, baking powder, and salt. In another bowl mix together egg, milk, butter, vanilla, and mashed bananas. Add dry ingredients to wet ingredients and mix until just combined (do not overmix, a few lumps are okay!). Gently stir in nuts. Lightly grease your preheated skillet. Pour 1/4 cup batter onto the skillet. Cook 1-2 minutes until edges begin to look “dry”. Flip with spatula, then cook another 1-2 minutes. Repeat with remaining batter. Serve with syrup and chopped nuts as desired.