In a mixing bowl, combine the mashed ripe bananas, dulce de leche, eggs, and vegetable oil. Mix until well incorporated.
In a separate bowl, whisk together the all-purpose flour, baking powder, baking soda, cinnamon, nutmeg
Gradually add the dry ingredients to the wet mixture, stirring until a smooth batter forms.
Preheat your oven and grease a loaf pan. Pour the banana bread batter into the pan.
If desired, sprinkle chopped nuts over the top of the banana bread batter for added texture and flavor.
Bake the Spiced Dulce de Leche Banana Bread in the preheated oven until it's golden brown and a toothpick inserted into the center comes out clean.
Once baked, let the banana bread cool slightly. For an extra touch of sweetness, drizzle additional dulce de leche over the top.