Chewy Chocolate Banana Oatmeal Cookies

These Chocolate Banana Oatmeal Cookies are a tasty, wholesome treat that blends the natural sweetness of ripe bananas with rich chocolate. Rolled oats give them a hearty chew and the cocoa adds deep chocolate flavour. They bake up soft and chewy, require no chill time, and come together in one bowl with simple pantry ingredients.

After making a classic chocolate oatmeal cookie, a banana version was a natural next step. This recipe is an excellent way to use up ripening bananas and produces cookies that are gooey in the center, slightly crisp at the edges, and full of comforting textures and flavours.

They are quick to prepare and forgiving to bake, so they’re a great option for an everyday snack, a lunchbox addition, or a simple dessert. Follow the steps below for reliable results, and consult the FAQ for storage and finishing tips.

Step by step instructions

These cookies come together easily in a few steps. Prepare two baking trays lined with parchment paper and have a mixing bowl and spatula ready. A cookie scoop makes portioning faster, but you can also use spoons.

Step 1 — Prep. Preheat the oven to 350°F (176°C). Line two trays with parchment paper. Melt the butter and let it cool slightly while you measure the remaining ingredients.

Step 2 — Combine dry ingredients. In a bowl mix the all-purpose flour, rolled oats, sifted cocoa powder, baking soda, baking powder, cornstarch, ground cinnamon, and salt. Stir to combine and set aside.

Step 3 — Whisk butter and sugars. In a larger bowl whisk the melted, slightly cooled butter with the dark brown sugar and white sugar until smooth and combined, about 1–2 minutes.

Step 4 — Add the wet ingredients. Whisk in the eggs, vanilla, and mashed banana. Continue mixing for another minute or two until everything is incorporated. The batter may be slightly chunky from the banana — that’s expected.

Step 5 — Fold in dry ingredients. Add the dry mix to the wet mixture and fold gently with a spatula until a soft cookie dough forms. Stop as soon as the dry ingredients are incorporated — over-mixing will make the cookies tough.

Step 6 — Add chocolate chips. Fold in the semi-sweet chocolate chips until evenly distributed. Reserve a few chips to press onto the tops of the cookies before baking if you like a decorative finish.

Step 7 — Scoop and bake. Portion the dough onto the prepared trays, spacing cookies well apart. Bake for 13–16 minutes at 350°F / 176°C. They are done when the edges look set and dry while the centers still appear slightly puffy and underbaked. The cookies will finish setting on the hot pan once removed from the oven.

Step 8 — Cool and enjoy. Let the cookies rest on the baking pan for several minutes, then transfer to a wire rack to cool completely. Serve warm or at room temperature.

FAQ

How do I store these cookies?

Store cooled cookies in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate for up to one week or freeze for up to 2 months. Thaw frozen cookies at room temperature before serving.

Is the banana essential?

Yes — mashed banana is a primary flavour and moisture source in this recipe. If you prefer a version without banana, try a classic chocolate oatmeal cookie recipe instead.

How can I tell when the cookies are done?

Because these cookies contain cocoa, they don’t brown in the same way as lighter cookies. Look for set, dry edges and centers that remain slightly puffy and underbaked; they will continue to firm as they cool on the pan.

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