Step 1: Preheat your oven to 400°F (200°C).
Step 2: In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, ground cinnamon, and salt until well combined.
Step 3: Add the cold, cubed butter to the flour mixture. Using a pastry cutter or fork, cut the butter into the dry ingredients until the mixture resembles coarse crumbs.
Step 4: In a separate bowl, combine the mashed ripe bananas, milk, vanilla extract, and the lightly beaten egg. Mix until everything is well incorporated.
Step 5: Pour the wet mixture into the dry ingredients. Gently fold the mixture together until just combined.
Step 6: Turn the dough out onto a lightly floured surface. Pat it into a circle about 1-inch thick. Cut the dough into wedges or use a biscuit cutter to create round scones.
Step 7: Bake in your preheated oven for 15-20 minutes, or until the tops are lightly golden and a toothpick inserted into the center comes out clean.
Step 8: While the scones are baking, whisk together the confectioners’ sugar, maple syrup, and heavy cream in a small bowl.
Step 9: Once the scones are out of the oven, allow them to cool for about 5 minutes. Drizzle the maple glaze over the warm scones.