Preheat oven to 450 degrees. Line sheet pan with parchment paper and lightly grease with butter (for more flavor).
Whisk dry ingredients together in a bowl.
Beat eggs. Mix with milk, vanilla, maple syrup in another bowl.
Pour wet ingredients into dry and mix until just combined. Do not over mix.
Add melted butter and allow batter to sit for 3-5 minutes.
Pour batter into sheet pan lined with parchment. Spread batter to edges. Sprinkle on toppings.
Bake for 10 minutes until middle is set (it will spring to the touch) and top is golden brown.
Dust with powdered sugar, if desired, and cut into slices.