Banana Chips in the Oven — Golden, Crispy & Naturally Sweet

Homemade banana chips are thin ⅛-inch (3 mm) banana slices dipped in lemon water and baked at 250°F (120°C) for 2 hours, until they snap like wafers. No oil, no frying, no added sugar. I started making them the day I read the label on a bag of store-bought chips: fried in coconut oil, then coated in sugar.

And for once, I’m telling you not to wait for the brown spots. Firm yellow bananas make the crispiest chips. They’re also the crunchy star of our peanut butter banana trail mix.

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Why You’ll Love These Homemade Banana Chips

My three kids eat them by the handful after school, and I finally know exactly what’s in the bag. Here’s why this simple recipe earned a spot in our weekly routine.

• Just two ingredients. Bananas and a splash of lemon juice. Water doesn’t count.
• Baked, not fried. About 100 calories and less than half a gram of fat per ounce, compared with about 147 calories and 9.5 g of fat for fried store-bought chips.
• No dehydrator needed. Your regular oven does the job in 2 hours. If you do own a dehydrator, I’ve included that method too.
• Lunchbox-ready for 2 weeks. Fully dried chips keep 14 days in a jar, no fridge needed.
• Naturally sweet. Drying concentrates the banana’s own sugar, so they taste like candy without any added.

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What You Need to Make Banana Chips

This is the shortest ingredient list on the blog. The real secret is choosing the right bananas and slicing them evenly, so let’s start there.

The Bananas

Bananas. Use 4 medium bananas, about 7 to 8 inches (18 to 20 cm) long, or roughly 1 lb (470 g) once peeled. Pick them bright yellow and firm to the touch. A few tiny freckles are fine, but skip any with big brown patches. One banana gives about 30 g of chips, which is one serving.

Keep in mind that these chips are hard and brittle once dry. For babies and young toddlers, make soft, baby-safe banana snacks instead.

The Lemon Wash

Fresh lemon juice. Use 2 tablespoons (30 ml), from about 1 lemon. It stops the slices from turning gray and keeps them golden in the oven. You’ll barely taste it, just a light tang that balances the sweetness. Bottled lemon juice works too.

Cold water. Use 1 cup (240 ml). It stretches the lemon juice so every slice gets coated.

Substitutions. Fresh lime juice works the same way, and it’s the base of my chili-lime version below. Unsweetened pineapple or apple juice also prevents browning, and they give slightly darker, sweeter chips.

Optional Seasonings

Ground cinnamon. Use ½ teaspoon for the whole batch, dusted on before baking. My kids’ favorite.

Fine sea salt. Use 1 small pinch. A few grains make the banana taste sweeter and more caramel-like.

Why Firm Yellow Bananas Work Best

Firm bananas slice cleanly into thin, even rounds that hold their shape. Soft, spotty bananas squash under the knife, stick to the parchment and caramelize too fast because they hold more sugar. The result is chewy, dark chips that never really crisp up. So save your spotty bananas for banana bread, and bake your chips with the yellow ones.

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How to Make Banana Chips in the Oven

The hands-on part takes 10 minutes. After that, the oven does the work while you get on with your afternoon. I’ve split the method into three stages, so you always know where you are.

Stage 1: Prep the Oven and the Slices

1. Preheat the oven. Set a rack in the middle and heat the oven to 250°F (120°C). If your oven holds a steady 200°F (95°C), you can use that for paler, even crunchier chips (see my tips).
2. Line two baking sheets. Use large rimmed baking sheets with parchment paper or silicone baking mats, so the chips don’t stick.
3. Mix the lemon wash. In a shallow bowl, stir together 2 tablespoons (30 ml) of lemon juice and 1 cup (240 ml) of cold water.
4. Slice the bananas thin. Peel the bananas and cut them into ⅛-inch (3 mm) rounds. A mandoline set to 3 mm is the easiest way to keep every slice the same thickness. A sharp chef’s knife works if you take your time.
5. Dip each slice. Drop the slices into the lemon water for about 5 seconds, then lift them out and let the extra liquid drip off. If you’d rather, arrange them on the sheets first and brush both sides with the lemon water.

Stage 2: Bake and Flip

6. Arrange in a single layer. Lay the slices flat on the lined sheets, with a little space between them so the air can move. Two sheets hold about 200 slices.
7. Season (optional). Dust the tops lightly with cinnamon or a tiny pinch of sea salt.
8. Bake for 1 hour to 1 hour 15 minutes. Put both sheets in the oven. The slices will shrink and turn pale gold.

9. Flip every slice. Take the sheets out and turn each slice with a thin offset spatula. They’ll feel leathery and bendy at this point, and that’s normal.
10. Bake another 45 to 60 minutes. Return the sheets to the oven, swapping their positions so they dry evenly.

Stage 3: Test and Cool Until They Snap

11. Check at the 2-hour mark. The chips are ready when they feel dry, firm and rigid, with no soft or spongy centers. Thin edge slices may be ready first, so take those out early.
12. Cool on the pans for 15 to 20 minutes. Leave the chips on the warm sheets at room temperature. They go from slightly leathery to fully crisp as they cool. Then move them straight into an airtight jar.

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How to Make Dehydrated Banana Chips (Food Dehydrator Method)

If you already own a food dehydrator, it makes the most even banana chips of all. It’s slower than the oven, but you can start it at bedtime and wake up to a full batch. Prep is exactly the same.

Dehydrator Steps

1. Slice and dip. Follow steps 3 to 5 above: slice the bananas ⅛ inch (3 mm) thick and dip them in lemon water.
2. Fill the trays. Arrange the slices in a single layer on the dehydrator trays, not touching.
3. Dehydrate at 135°F (57°C) for 10 to 14 hours. Start checking at 10 hours. Thinner slices and a dry kitchen finish sooner.
4. Cool and test. Let the chips cool for 15 minutes on the trays. They’re ready when they snap. If they still bend, dehydrate them 1 to 2 hours more.

Dehydrated banana chips come out paler and more uniform than oven-baked ones. They’re often a little chewier in the center unless they’re sliced very thin.

Oven vs. Dehydrator vs. Fried Banana Chips

People ask me which method is best, so here’s the side-by-side comparison. The oven is the quickest homemade option. The dehydrator is the most hands-off, and frying is what you usually get in a store-bought bag.

	Oven-baked (this recipe)	Food dehydrator	Deep-fried (store-bought)
Temperature	250°F (120°C)	135°F (57°C)	About 350°F (175°C) oil
Time	2 h + 20 min cooling	10 to 14 h	3 to 4 min
Oil	None	None	Coconut or vegetable oil
Added sugar	None	None	Often a sugar or honey syrup
Texture	Crisp, wafer-like, golden	Crisp to slightly chewy, pale	Very crunchy, glossy
Calories per oz (28 g)	About 100	About 100	About 147
Fat per oz (28 g)	Less than 0.5 g	Less than 0.5 g	About 9.5 g
Pantry life	14 days	14 days	Several months, sealed

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Lily’s Tips for Crispy Banana Chips

My first batch came out chewy, my second one burned, and my third one was a whole tray of golden snaps. These are the lessons from the batches in between.

• Use a mandoline. Even thickness is everything. If one slice is 2 mm and the next is 5 mm, the thin one burns before the thick one dries. A mandoline set to 3 mm gives you 200 identical slices in 3 minutes.
• Choose firm, yellow bananas. Brown-spotted bananas contain up to 80% more natural sugar than yellow ones. That’s wonderful in banana bread, but in the oven all that sugar caramelizes, sticks and keeps the chips chewy.
• Never go above 250°F (120°C). Banana sugar burns quickly and turns bitter. Low and slow is the whole method. At 200°F (95°C), plan on 2½ to 3 hours.
• Don’t panic if they’re soft out of the oven. “Banana chips aren’t done when they come out of the oven — they finish as they cool.” Give them the full 15 to 20 minutes before you judge them.
• Re-crisp anytime. If a jar goes soft on a humid day, spread the chips on a sheet and bake them 10 minutes at 250°F (120°C). Cool them again, and the crunch is back.

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Banana Chip Variations

Once you’ve made the plain version, the lemon wash and the seasoning are easy to play with. Each of these uses the same method and the same timings.

Cinnamon Banana Chips

Mix ½ teaspoon of ground cinnamon with 1 teaspoon of coconut sugar. Sprinkle it lightly over the slices before baking. They taste like cinnamon toast in chip form, and they’re the version my kids request most.

Chili-Lime Banana Chips

Swap the lemon juice for fresh lime juice. Before baking, dust the slices with a pinch of Tajín, or with ¼ teaspoon of mild chili powder mixed with a pinch of salt. They’re sweet, tangy and a little warm, and they’re the ones the grown-ups finish first.

Salted Caramel Banana Chips

Skip the seasoning before baking. As soon as the chips come out of the oven, sprinkle them with a generous pinch of flaky sea salt, so it sticks while they’re still warm. The salt brings out the caramel notes the banana already has.

Crunchy Topping Ideas

Banana chips aren’t only a snack. Crush a handful and scatter it over yogurt, oatmeal or granola. They also make a crunchy topping on a chocolate banana smoothie bowl. If you want a mixed jar of baked fruit chips, the same low-and-slow method works for thin apple slices. Start checking those at 1½ hours.

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How to Store Homemade Banana Chips

Moisture is the only enemy here. Keep your chips sealed and dry, and they stay crisp for 2 weeks.

Counter: Up to 14 days in an airtight glass jar or zip-top bag, in a cool, dry cupboard. The chips are fully dried, so nothing spoils; air humidity is what softens them.

Fridge: Up to 21 days in an airtight container, but only if your kitchen is hot and humid. The fridge can soften them, so re-crisp them 10 minutes at 250°F (120°C) and cool 15 minutes before eating.

Freezer: Up to 6 months in a freezer bag with the air pressed out. Let the sealed bag sit 15 minutes on the counter before opening, so no condensation forms on the chips. Re-crisp them 5 to 10 minutes at 250°F (120°C) if needed.

Meal prep tip: On Sunday, I bake two full sheets and portion them into ¼-cup snack bags for the week’s lunchboxes. Any extras go over breakfast: sprinkle a handful on top of a jar of creamy banana overnight oats just before eating, so they stay crunchy.

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Banana Chips FAQ

These are the questions I get most often about banana chips, with the short answer first.

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From Our Oven to the Lunchbox

Your first tray might not be all golden snaps, and that’s okay. Mine wasn’t either. Slice thin, go low and slow, and give them time to cool. By the second batch, you’ll hear the crunch from across the kitchen.

If you love this, try our frozen chocolate-dipped banana bites or chewy banana granola bars for the lunchbox next!

Love, Lily 🍌