3 hours
0 serving
Easy
306 kcal
Ingredients
- 6 large green bananas (e.g., green Cavendish or plantains)
- Water for boiling (optional)
- 1 tablespoon vinegar (for cleaning)
Directions
- Clean the green bananas thoroughly with water and vinegar.
- Boil the bananas whole with the peel on for 2 minutes to make them easier to handle.
- Peel the bananas and slice them into very thin, uniform rounds.
- Arrange the slices on a baking sheet in a single layer, ensuring they do not overlap.
- Bake at the lowest oven setting (175°F-212°F / 80°C-100°C) for about 2 to 3 hours, flipping the slices halfway through.
- Check if the slices are completely dry and brittle to the touch.
- Let them cool completely before processing in a blender or food processor.
- Pulse until you get a fine powder. For an extra-fine texture, pass it through a sieve.
- Store in an airtight glass jar in a cool, dry place for up to 30 days.
Chef’s Tips
- The thinner you slice them, the faster the drying process will be.
- Use gloves when handling green bananas, as the sap can stain your hands.
- Do not blend the slices while they are still warm; this will add moisture and ruin the shelf life.
- This flour can be used as a partial substitute for wheat flour in up to 50% of your recipes.
Test Kitchen Notes
Making green banana flour at home requires patience, not complex techniques. The most common mistake is the oven temperature: if it’s too high, the peel and pulp will caramelize before dehydrating, creating a bitter taste and dark color. The ideal point is when the slice snaps and crumbles completely between your fingers when pressed. If it bends or feels rubbery, it needs more time. Pro-tip: Use an aluminum baking sheet lined with parchment paper, as direct contact with the metal can quickly darken the edges. If your oven runs hot, keep the door slightly ajar with a wooden spoon to allow moisture to escape.
Validated Substitutions
If you don’t have a conventional oven, you can use an Air Fryer at 200°F (approx. 95°C) for 30 to 40 minutes (check every 10 minutes to prevent burning). For those who prioritize convenience, a food dehydrator is the gold standard, ensuring a lighter-colored flour with superior nutrient preservation. If you prefer a more neutral flavor, use only the banana pulp, although including the peel (when well-cleaned) significantly increases fiber content and reduces food waste.
Frequently Asked Questions
Can I freeze green banana flour?
Yes, you can freeze it in an airtight container or a heavy-duty freezer bag. Freezing helps preserve the resistant starch and prevents oxidation, maintaining quality for up to 3 months. Only remove the portion you need for your recipe.
What is the difference between green banana flour and green banana biomass?
The main difference is moisture content and storage. Biomass is a paste made from cooked green bananas that must be kept refrigerated and consumed within a few days. Flour is a dehydrated, dry product with a long shelf life, perfect for replacing conventional flours in recipes.
Why did my flour turn dark?
Dark color usually indicates oxidation or excessive heat during drying. To prevent this, soak the banana slices in acidulated water (with a splash of lemon juice or vinegar) before slicing, and keep the oven temperature low—never exceeding 212°F (100°C) to ensure a lighter, brighter color.