Select the Preheat function, adjust temperature to 320°F, then tap Start/Pause.
Grease the mini loaf pans with oil spray, then divide the batter between the prepared pans.
Place the pans inside the preheated basket.
Select the Bake function, adjust temperature to 320°F and time to 25 minutes, then tap Start/Pause.
Remove when done and a toothpick or knife inserted into the middle comes out clean or with just a few crumbs attached. Cool banana bread in the pans for 10 minutes, then remove and transfer to a wire rack to cool completely before serving.