These healthy oatmeal cookies are soft in the center, lightly crisp at the edges, and made with rolled oats, whole-wheat flour, mashed banana, and a modest amount of maple syrup. They make a satisfying snack or simple dessert, and the dough comes together in one bowl without a mixer.
Ingredients
- 1 cup (225 g) mashed ripe banana, about 2 medium bananas
- 1 large egg (about 50 g without shell)
- ¼ cup (60 ml) pure maple syrup
- 2 tablespoons (30 ml) neutral oil, such as avocado or canola oil
- 1 teaspoon (5 ml) vanilla extract
- 1½ cups (135 g) old-fashioned rolled oats, divided
- ¾ cup (90 g) whole-wheat pastry flour or regular whole-wheat flour
- ½ teaspoon (2.5 g) baking soda
- ½ teaspoon (1.5 g) ground cinnamon
- ¼ teaspoon (1.5 g) fine salt
- ⅓ cup (40 g) chopped walnuts or raisins
Instructions
- Heat the oven to 350°F (175°C). Line a large baking sheet with parchment paper. Mash the bananas until mostly smooth; a few small lumps are fine. Measure the mashed fruit rather than relying only on the number of bananas, since size and moisture vary.
- In a medium bowl, whisk together the mashed banana, egg, maple syrup, oil, and vanilla until evenly combined.
- Add the oats, flour, baking soda, cinnamon, and salt. Stir with a sturdy spoon just until no dry patches remain, then fold in the walnuts or raisins. Let the dough stand for 5 minutes so the oats can absorb some moisture. It will be softer and stickier than classic butter-cookie dough.
- Scoop 12 portions, about 2 tablespoons (35–40 g) each, onto the prepared baking sheet, leaving roughly 2 inches (5 cm) between them. Flatten each mound to about ½ inch (1.3 cm) thick with damp fingers or the back of a spoon; these cookies spread very little as they bake.
- Bake for 11–13 minutes, until the edges look set and lightly golden and the centers no longer appear wet. Because the dough contains egg, check one thick cookie with a food thermometer if you need to confirm doneness: the center should reach 160°F (71°C), the USDA FSIS safe minimum for egg dishes. If it has not reached that temperature, bake for another minute or two and check again.
- Leave the cookies on the baking sheet for 5 minutes to firm up, then transfer them to a wire rack to cool. They are tender while warm and become easier to handle as they cool.
Tips
- Use ripe bananas with plenty of brown speckles for the best sweetness and flavor. Very large or unusually wet bananas can make the dough loose; if necessary, stir in 1 tablespoon (8 g) extra flour and let the dough stand for another 5 minutes.
- Measure flour by spooning it into the cup and leveling the top, or weigh it. Scooping directly with the measuring cup can pack in too much flour and make the cookies dry or crumbly.
- Old-fashioned rolled oats give these cookies a pleasantly chewy texture. Quick oats can work in a pinch, but they absorb moisture faster and make a softer, less distinct texture; steel-cut oats are not a suitable direct swap.
- Do not overbake in pursuit of a crisp cookie. The edges should be set while the centers are still soft; they will firm as they cool. For even baking, use a light-colored sheet and bake one tray at a time in the center of the oven.
Serving Suggestions
Serve the cookies warm or at room temperature with tea, coffee, or a glass of milk. For a more substantial snack, pair one or two with plain yogurt and fresh fruit. They also travel well in a lunch box once fully cooled; pack them in a firm container so the soft centers do not get crushed.
Variations
For a chocolate version, replace the walnuts or raisins with ⅓ cup (55 g) dark chocolate chips. To make the recipe dairy-free, no change is needed as written; check that any chocolate chips are dairy-free. For a nut-free batch, use raisins, dried cranberries, or an equal amount of sunflower seeds instead of walnuts.
You can replace the maple syrup with ¼ cup (60 ml) honey, though honey is not vegan and lends a more pronounced flavor. For a gluten-free version, use a certified gluten-free oat product and a 1:1 gluten-free baking flour blend in place of the whole-wheat flour; check the blend’s packaging for suitability in cookies. The result may be a little more delicate, so cool the cookies completely before moving them.
Storage and Reheating
Cool the cookies completely, then refrigerate them in an airtight container within 2 hours of baking. They keep for 3–4 days in the refrigerator. For longer storage, freeze in a sealed container with parchment between layers for up to 2 months; thaw at room temperature for about 30–45 minutes. To warm a cookie, microwave it for 8–12 seconds, or heat it in a 300°F (150°C) oven for about 5 minutes. Avoid leaving the egg-containing cookies at room temperature for more than 2 hours.
Frequently Asked Questions
Can I make the dough ahead?
Yes. Cover and refrigerate it for up to 24 hours. Chilled dough will be firmer, so let it sit for 10–15 minutes before scooping if it is difficult to portion. Bake the cookies according to the visual cues and temperature check in the instructions.
Why did my cookies turn out too soft?
These banana-oat cookies are naturally soft and cakey rather than crisp. Extra banana, underbaking, or using a dark crowded baking sheet can make them softer still. Measure the banana, flatten the portions, and bake until the edges are set and the center reaches 160°F (71°C).
Can I use instant oats?
Instant oats can be used, but the cookies will be less chewy and may feel more compact. Avoid flavored instant oatmeal packets, which contain added sweeteners and seasonings that change the recipe.
Can I make these cookies without egg?
A commercial egg replacer may work, but the egg helps bind the banana and oats, so texture can vary. Follow the replacer’s package directions for one egg, and bake until the centers are set; do not use raw or undercooked dough.
Are these cookies gluten-free?
Not as written: whole-wheat flour contains gluten, and oats can be exposed to gluten during processing. Use certified gluten-free oats and a suitable gluten-free flour blend, and check all ingredient labels if you need to avoid gluten.
Can I make the cookies sweeter?
For a sweeter result, add 1–2 tablespoons (12–25 g) of brown sugar or use chocolate chips. Avoid adding much more liquid sweetener, since that can make the dough spread or stay too soft.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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