In a mixing bowl, combine the olive oil, paprika, cumin, salt, chili powder, and cayenne pepper powder.
Slice the bananas into thin circles, then coat then transfer them to the mixing bowl. Coat the banana slices thoroughly with the spices.
Transfer the coated banana slices to a foil-lined baking sheet and spread them evenly.
Place the baking sheet in the oven. Bake the banana slices for 8 minutes, then flip the slices and bake for another 5 minutes or until golden brown. Check often on the chips to make sure they don't burn.
Remove the chips from the oven, allow them to cool for 5 minutes, then serve.
For a milder spicy banana chip, reduce or remove completely the cayenne pepper powder from the ingredient list. You will still get a mild heat from the paprika and chili powder.