Preheat the oven to 350 degrees F (175 degrees C). Grease cookie sheets.

Cream brown sugar and 3/4 cup banana together in a large bowl using an electric mixer. Beat in remaining banana. Stir in vanilla extract.

Combine flour, protein powder, salt, cinnamon, baking soda, and cloves in another bowl; stir into banana mixture. Mix in rolled oats.

Drop by rounded tablespoonfuls onto the prepared cookie sheets; leave room for spreading.

Bake in the preheated oven until edges are set and golden, 8 to 10 minutes. Let cookies cool on the sheets for 5 minutes before transferring to a wire rack to cool completely.