01 -
Preheat oven to 375°F. Generously grease a 2-quart or 9x9-inch baking dish.
02 -
In a bowl, blend together the packed brown sugar, self-rising flour, and softened butter using a fork until the mixture resembles coarse crumbs. Stir in the oats and chopped pecans until evenly incorporated. Set aside.
03 -
In a separate bowl, whisk self-rising flour, granulated sugar, and milk just until smooth. Blend in the melted butter and banana extract, if using.
04 -
Pour batter evenly into the prepared baking dish. Arrange sliced bananas in an even layer over the batter.
05 -
Distribute the streusel topping evenly over the bananas, covering the surface completely.
06 -
Bake in the preheated oven for 45 to 50 minutes, or until the topping is golden brown and the filling is set.
07 -
Allow to cool for a few minutes before serving warm. Garnish with vanilla ice cream or additional banana slices if desired.