Preheat oven to temperature indicated on package. Unroll croissants and divide into separate triangles.
Add about 2 tsp to 1 Tbsp of peanut butter to each triangle. Top with banana quarter. Starting at the large side roll up.
Place on an ungreased baking sheet. Bake for 10-13 minutes until golden brown. If desired, dust with a little bit of powdered sugar. Allow to cool for about 5 minutes before eating.
Store any leftovers in the fridge. Reheat in the microwave for about 15-20 seconds.