4-Ingredient Flourless Oatmeal Cookies
These flourless oatmeal cookies are the kind of treat you can throw together when the pantry looks bare and a craving hits. No flour, no fuss, just oats, banana, peanut butter, and a handful of chocolate chips.
They come out soft in the middle with crisp edges, and they taste like a cross between a granola bar and a warm cookie. I keep a batch on my counter when I want something sweet that actually fills me up.
Why These Cookies Work
They come together in one bowl and take about 12 minutes in the oven. The mashed banana binds everything without any flour, and the peanut butter adds richness that keeps them from drying out.
What I like most is how forgiving they are. Over-ripe bananas work best, but you can swap in almond butter or sunflower seed butter without changing the texture much. It’s the kind of recipe you memorize after the first try.
Ingredients
- 2 ripe bananas: the spottier, the sweeter
- 1 cup quick-cooking oats: not instant, not steel-cut; these hold their shape best
- 1/4 cup creamy peanut butter: no-stir natural works, but avoid the ultra-drizzly kind
- 1/4 cup chocolate chips: mini chips distribute better, but regular are fine
Variations
- Nut-free option: swap sunflower seed butter for the peanut butter.
- Change the add-in: trade the chocolate chips for raisins, dried cranberries, or chopped walnuts.
- Spice it up: add 1/2 teaspoon cinnamon or a splash of vanilla for extra warmth.
If you like these, you’ll probably want to try my oat flour chocolate chip cookies next.
How to Make Flourless Oatmeal Cookies
Step 1: Mash the Bananas
Peel the 2 ripe bananas and place them in a medium bowl. Mash with a fork until mostly smooth, about 30 seconds. A few small lumps are fine. They add a little moisture.
Step 2: Mix the Dough
Add the 1 cup of oats, the 1/4 cup peanut butter, and the 1/4 cup chocolate chips to the bowl. Stir with a spatula or spoon until everything is evenly combined, about 1 minute. The dough will be thick and sticky.
Step 3: Shape the Cookies
Preheat your oven to 350°F (180°C) and line a baking sheet with parchment paper. Drop rounded tablespoonfuls of dough onto the sheet, spacing them about an inch apart. Use the back of a spoon to gently press each mound into a flat round, because these cookies won’t spread much on their own.
Slide the sheet into the oven and bake for 10 to 12 minutes. The edges will look set and lightly golden, while the centers remain soft.
Step 4: Cool and Serve
Let the cookies rest on the baking sheet for 2 minutes before you move them to a wire rack to cool completely. The chocolate chips will be melty and the kitchen will smell like warm banana bread. Serve them once they’re cool enough to handle, or pile them onto a plate still warm and watch them disappear.
A Few Notes Before You Start
- If your bananas aren’t brown enough yet, add a teaspoon of maple syrup or honey to the dough. It helps mimic the extra sweetness of a fully ripe one.
- Quick-cooking oats work best because they soften enough during baking without turning mushy. Old-fashioned oats will leave the cookies a bit too chewy, and instant oats can turn gummy.
- Don’t overmix the dough. Stir just until the oats are coated. Overworking makes the cookies tough.
- These cookies have a soft, cake-like texture. If you want a firmer bite, let them cool completely on the rack rather than eating them warm.
- For a peanut-free kitchen, sunflower seed butter is a reliable swap. The dough might turn a faint greenish tint during baking (a reaction with baking soda in the sunflower butter), but the taste stays just as good.
Keeping Them Fresh
Store the cookies in an airtight container at room temperature for up to 3 days. They’ll soften further as they sit, which I actually prefer. To freeze, layer them between sheets of parchment in a sealed container and freeze for up to 2 months. Thaw on the counter for about 30 minutes.
Frequently Asked Questions
Are these cookies gluten-free?
They can be if you use certified gluten-free oats. Oats are naturally gluten-free, but cross-contamination is common during processing.
Can I freeze the dough instead of baked cookies?
Yes. Scoop the dough onto a parchment-lined sheet, freeze until solid, then transfer the dough balls to a zip-top bag. Bake straight from frozen, adding 2 to 3 extra minutes to the bake time.
Why did my cookies turn out crumbly?
That usually means the bananas were a bit small or not ripe enough. The dough needs enough moisture to hold together. Next time, use very spotty bananas and make sure you mash them well before adding the dry ingredients.
Flourless Oatmeal Cookies Recipe
Ingredients
Method
- Mash bananas in a bowl until mostly smooth.
- Stir in oats, peanut butter, and chocolate chips until combined.
- Drop spoonfuls onto a lined baking sheet, press flat, and bake at 350°F for 10 to 12 minutes.
- Cool on the sheet for 2 minutes, then transfer to a rack to cool completely.
