• Get prepped: Preheat the oven to 425°F. Line a13 by 18 inch sheet pan with parchment. Slice the banana. Dice the ½ cup finely diced apples and toss them with 1 tablespoon sugar and ½ teaspoon cinnamon.
• Mix the dry ingredients: Whisk 2 cups all-purpose flour, 1 tablespoon baking powder, 1 teaspoon salt, and 3 tablespoons sugar together in a large bowl.
• Mix the wet ingredients: In another bowl, whisk 1¾ cups milk, 2 large eggs, 4 tablespoons butter (melted), and 1 teaspoon vanilla extract until smooth.
• Combine: Pour the wet mixture into the dry ingredients and stir until just combined. A few small lumps are fine.
• Spread the batter: Pour the batter onto the sheet pan and spread evenly from corner to corner.

Add toppings:

• Chocolate chip section: Sprinkle½ cup mini chocolate chips over one quarter of the pan.
• Blueberry section: Scatter ½ cup blueberries over the second quarter.
• Banana section: Arrange 1 sliced banana over the third section in a single layer.
• Apple cinnamon section: Spread cinnamon sugar apples over the final section.
• Bake: Bake for 10 to 15 minutes until the center is set and the edges are lightly golden.
• Serve: Cool slightly, cut into squares, and serve warm with maple syrup, powdered sugar, or extra chocolate chips.