Mashed bananas and oat flakes make a simple, dense bake without flour, eggs or baking powder. Expect a moist oat texture rather than a fluffy sponge cake. A small suitable pan and an even layer help it cook and hold together after cooling.
Recipe Details
- Oven: 350°F (175°C)
- Bake: about 25 minutes, depending on pan size and depth
Ingredients
- 2 ripe bananas
- 1 cup oat flakes
- A little oil or cooking spray, for the pan (optional)
How to Make Banana Oat Bake
Prepare the oven and pan
Heat the oven to 350°F (175°C). Lightly grease a suitable small baking pan or line it with baking parchment.
Mash and mix
Mash the peeled bananas until mostly smooth. Stir in the oat flakes until evenly coated.
Spread evenly
Transfer to the pan and spread in an even layer. Avoid a very deep layer, which can leave a wet center.
Bake
Bake for about 25 minutes, until the surface is lightly golden and the mixture is set through the middle. Pan depth and banana size can change the time; continue baking if the center remains very wet.
Cool and cut
Let the bake cool in its pan before cutting. The cooled oat mixture holds together better than when hot.
Tips and Common Mistakes
- Use ripe bananas so they mash readily and mix through the oats.
- No baking powder is included, so do not expect a tall, airy cake.
- Spread the mixture evenly for more consistent cooking.
- Cool before slicing to reduce crumbling.
- There is no added sugar in the two main ingredients, but bananas contain natural sugars.
Storage and Make-Ahead Tips
Keep the cooled bake covered in the refrigerator and use within 3–4 days. Reheat individual pieces if desired. Store promptly rather than leaving a moist fruit-based bake out for extended periods.
Frequently Asked Questions
Is this a fluffy banana cake?
No. Without flour, eggs or a raising agent, it is a dense banana-and-oat bake.
Is it sugar-free?
No. No sugar is added to the main mixture, but bananas contain naturally occurring sugars.
Why does it fall apart when hot?
The moist mixture firms as it cools. Allow it to cool in the pan before cutting.