Preheat the oven to 425, then line a rimmed baking sheet with parchment paper and spray the paper and the sides of the pan with nonstick spray.
In a bowl, whisk together flour, sugar, baking powder, salt, and cinnamon.
Whisk in the buttermilk, eggs, and vanilla.
Pour batter onto a baking sheet and spread into an even layer.
Arrange peaches and strawberries across the top.
Bake until pancake springs back slightly when touched in the center, 12 to 15 minutes.
Sprinkle pancake with confectioners’ sugar and cinnamon, then slice into squares then serve with maple syrup. Enjoy!