- 2 small (140 g/4.9 oz) ripe bananas (weight without peel) (see notes)
- Preheat the oven to 350°F (177°C) and grease a 6x9 inch (15x23 cm) or similar-sized baking pan with oil.
- In a large bowl, mash the 2 bananas with a fork. Add in peanut butter, maple syrup, and vanilla extract. Mix until well combine