Preheat your oven to 350°F (175°C) and grease a 9x9-inch baking dish with butter.

In a skillet, melt 3 tablespoons of butter over medium heat, then add sliced bananas and sauté until golden, about 3-4 minutes.

Stir in brown sugar, vanilla, cinnamon, nutmeg, and salt. Cook for another 2-3 minutes until bubbly.

In a mixing bowl, whisk flour, baking powder, granulated sugar, and salt together. Cut in butter until crumbly, then add buttermilk and mix gently.

Layer the caramelized bananas in the baking dish and drop spoonfuls of cobbler topping over the top.

Bake for 25-30 minutes until the topping is golden brown and a toothpick inserted comes out clean.

Let cool for 5-10 minutes before serving, and enjoy with vanilla ice cream or whipped cream.