Brown Butter Banana Bread Chocolate Chip Cookie Bars
These Brown Butter Banana Bread Chocolate Chip Cookie Bars are soft, gooey, and incredibly indulgent with perfectly crisp and golden edges that make every single bite absolutely irresistible. The warming banana bread flavor is comforting and deeply satisfying, while the nutty brown butter adds a rich depth that takes every single bite completely over the top. Melty chocolate chips are studded throughout every single bite for little pockets of rich, indulgent chocolate that pair absolutely beautifully with the warm banana bread and brown butter flavors throughout. Served warm with a scoop of vanilla ice cream — the ultimate cozy treat you will want to make on repeat!
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Ingredients You Need:
Full ingredients and recipe are in the recipe card below. Read through this section for all the ingredients substitution and baking tips!
Salted Butter: Browned until deep golden amber and nutty before being added to the batter — the brown butter adds a warm, rich, and deeply nutty depth of flavor that pairs absolutely beautifully with the warming banana bread flavor and takes every single cookie bar completely over the top throughout.
Brown Sugar: Adds a deep, molasses-like sweetness that enhances the warm banana bread and brown butter flavors and keeps the cookie bars incredibly soft, gooey, and perfectly indulgent in the center throughout every single bite.
Granulated Sugar: Works alongside the brown sugar to create a perfectly balanced sweetness and helps create those signature perfectly crisp and golden edges on every single cookie bar throughout.
Mashed Ripe Banana: The star ingredient that gives these cookie bars their signature warm, sweet, and comforting banana bread flavor — make sure to use a deeply speckled and ripe banana and measure out exactly 1/2 cup for the most consistent flavor and texture in every single batch throughout.
Egg Yolk: The secret to the most incredibly soft, fudgy, and perfectly gooey cookie bar center — a single egg yolk adds richness and a deeply indulgent texture without the extra moisture that a whole egg would add throughout.
Vanilla Bean Paste or Extract: Adds a warm, sweet, and aromatic flavor that enhances the brown butter, banana bread, and chocolate chip flavors throughout every single bite of these cookie bars.
All-Purpose Flour: The base of the cookie bar batter that provides structure while keeping the center incredibly soft, gooey, and perfectly indulgent with those beautifully crisp and golden edges throughout.
Cornstarch: The secret ingredient that gives these cookie bars their incredibly soft, tender, and perfectly gooey center — it helps tenderize the flour and creates that signature melt-in-your-mouth texture that makes every single bite truly irresistible throughout.
Baking Soda: Reacts with the other ingredients in the batter to help the cookie bars rise and stay soft and tender with a perfectly golden and slightly crisp edge throughout.
Baking Powder: Works alongside the baking soda to give the cookie bars the perfect lift and ensures a beautifully even rise and golden top throughout every single bar.
Salt: Balances the sweetness and enhances all the warm brown butter, banana bread, and chocolate chip flavors throughout every single bite of these cookie bars.
Cinnamon: Adds a warm, cozy spice to the cookie bar batter that enhances the warming banana bread flavor and pairs absolutely beautifully with the deep nutty brown butter throughout every single bite.
Chocolate Chips or Baking Wafers: Folded into the cookie bar batter for melty pockets of rich, indulgent chocolate that pair absolutely perfectly with the warm banana bread and deep nutty brown butter flavors throughout — a mixture of semi-sweet chocolate chips and semi-sweet baking wafers is recommended for the most varied and perfectly melty chocolate in every single bite.
Why You’ll Love Brown Butter Banana Bread Chocolate Chip Cookie Bars:
Soft, Gooey, And Incredibly Indulgent: These cookie bars are incredibly soft, gooey, and perfectly indulgent in the middle with perfectly crisp and golden edges that give the most satisfying texture contrast in every single bite — absolutely irresistible from the very first bar to the very last.
Perfectly Crisp And Golden Edges: Each cookie bar bakes up with perfectly crisp and beautifully golden edges that give the most satisfying crunch and texture contrast with the soft and gooey center throughout every single bite.
Warming Banana Bread Flavor: Every single bite is packed with that warm, comforting, and deeply satisfying banana bread flavor that makes these cookie bars truly unique and completely irresistible in the most cozy and indulgent way throughout.
Brown Butter Richness: The brown butter adds a warm, nutty depth of flavor that pairs absolutely beautifully with the warming banana bread flavor throughout and takes these cookie bars completely over the top in the most indulgent and irresistible way.
Melty Chocolate Chips In Every Bite: Melty chocolate chips are studded throughout every single bite for little pockets of rich, indulgent chocolate that pair absolutely beautifully with the warm banana bread and deep nutty brown butter flavors throughout.
Served Warm With Vanilla Ice Cream: These cookie bars are even better served warm with a generous scoop of vanilla ice cream melting over the top — the contrast of the warm, gooey cookie bar and the cold, creamy ice cream makes every single bite completely and utterly irresistible throughout.
The Ultimate Cozy Treat: These brown butter banana bread chocolate chip cookie bars are the definition of the ultimate cozy treat — warm, indulgent, and deeply satisfying in every single bite whether you are serving them for a special occasion or a lazy weekend afternoon.
Perfect For Any Occasion: Whether it is a cozy weekend treat, a bake sale, a birthday dessert, or any time a banana bread craving hits, these brown butter banana bread chocolate chip cookie bars are always the ultimate crowd-pleasing treat on the dessert table.
Tips for Making Brown Butter Banana Bread Chocolate Chip Cookie Bars:
Brown The Butter First: Start by browning the butter before anything else so it has time to cool slightly before adding the sugars — hot brown butter can melt the sugars too quickly and affect the final soft and gooey texture of the cookie bars throughout.
Watch The Brown Butter Closely: Butter can go from perfectly browned to burnt very quickly so stay at the stove and stir continuously until it turns a deep golden amber color and smells nutty. Remove from the heat immediately and pour into a large bowl to stop the cooking process throughout.
Let The Brown Butter Cool Before Adding The Sugars: Allow the brown butter to cool for about 15–20 minutes before adding the sugars — it should be warm but not hot to the touch so it does not melt the sugars when combined and affects the final texture of the cookie bars throughout.
Use Very Ripe Bananas For The Best Flavor: The riper the banana, the sweeter and more flavorful the cookie bars will be — look for a banana that is deeply speckled or almost fully brown for the most incredible warm banana bread flavor that infuses every single bite throughout.
Measure The Mashed Banana: Measure out exactly 1/2 cup (120g) of mashed banana rather than going off the size of the banana — this ensures the most consistent flavor and texture in every single batch throughout.
Use Only One Egg Yolk: This recipe calls for just one egg yolk rather than a whole egg — the egg yolk adds richness and a fudgy, gooey texture without the extra moisture that a whole egg would add, resulting in a softer and more indulgent cookie bar throughout.
Use Room Temperature Egg Yolk: Make sure the egg yolk is at room temperature before adding to the batter — a room temperature egg yolk incorporates more evenly into the batter for the smoothest and most consistent result throughout.
Whisk The Brown Butter And Sugars Until Well Combined: Whisk the cooled brown butter and both sugars together until very well combined before adding the banana and egg yolk — a well-combined butter and sugar mixture is what creates that perfectly soft and gooey center throughout every single bar.
Whisk Until Lighter In Color After Adding The Banana: After adding the mashed banana, egg yolk, and vanilla, whisk until the mixture is lighter in color — this ensures everything is evenly incorporated and creates the most consistent texture and flavor throughout.
Don't Overmix The Batter: Fold the dry ingredients into the wet until just combined — overmixing will result in a tougher, denser cookie bar rather than a soft, gooey, and perfectly indulgent one throughout.
Use Cornstarch For Extra Softness: The cornstarch added to the dry ingredients is the secret to an incredibly soft, tender, and perfectly gooey cookie bar center — do not skip this ingredient for the best result throughout.
Check The Bottom Of The Bowl For Remaining Flour: Before adding the chocolate chips, make sure to check the very bottom of the bowl for any remaining flour streaks and fold them in — any unincorporated flour will result in dry pockets in the finished cookie bars throughout.
Use A Mix Of Chocolate Chips And Baking Wafers: A mixture of semi-sweet chocolate chips and semi-sweet baking wafers is recommended for the most varied and melty chocolate pockets throughout every single bite — the baking wafers melt into beautiful pools of chocolate while the chips hold their shape for the most satisfying texture throughout.
Spread The Dough Into An Even Layer: Spread the cookie dough evenly into the prepared pan before baking — an even layer ensures the most consistent bake with perfectly soft and gooey centers and perfectly crisp and golden edges throughout.
Bake Until The Edges Are Set But The Center Is Still Slightly Soft: The cookie bars are done when the edges are set and golden, the top is lightly golden brown, and a toothpick inserted into the middle comes out with no raw batter — do not overbake or the soft and gooey center will be lost throughout.
Cool For At Least 1 Hour Before Slicing: Allow the cookie bars to cool in the pan on a wire cooling rack for at least 1 hour before slicing — this is essential for the best texture and the cleanest slices. Cutting too early will result in bars that fall apart and lose that perfectly gooey center throughout.
Serve Warm For The Best Experience: These cookie bars are at their absolute best served warm with a generous scoop of vanilla ice cream melting over the top — the contrast of the warm, gooey cookie bar and the cold, creamy ice cream makes every single bite completely and utterly irresistible throughout.
How to Store Brown Butter Banana Bread Chocolate Chip Cookie Bars:
Best Served Fresh: These brown butter banana bread chocolate chip cookie bars are at their absolute best served warm and fresh the day they are made with a generous scoop of vanilla ice cream melting over the top for the ultimate cozy and indulgent treat throughout.
Room Temperature: Store the cookie bars covered or in an airtight container at room temperature for up to 3 days. The centers will remain soft and gooey and the edges will stay perfectly crisp and golden throughout.
Refrigerator: Store leftover cookie bars covered or in an airtight container in the refrigerator for up to 5 days. The bars will firm up slightly in the refrigerator so reheating before serving is recommended for the best soft and gooey texture throughout.
To Reheat: Warm individual cookie bars in the microwave for 15–20 seconds until warmed through and the chocolate chips are perfectly melty again — this brings back that fresh-from-the-oven soft and gooey texture and warm banana bread flavor beautifully throughout.
Freezer: Freeze individual cookie bars in a freezer-safe bag or container for up to 2 months. Thaw overnight at room temperature or in the refrigerator and warm in the microwave before serving for the best soft and gooey result throughout.
Make Ahead: These cookie bars can be baked a day in advance, cooled completely, covered tightly, and stored at room temperature. Warm individual bars in the microwave before serving and add a fresh scoop of vanilla ice cream right before serving for the best result throughout.
To Serve From Cold: Let refrigerated bars sit at room temperature for 15–20 minutes before reheating for the most even warmth throughout and the best soft, gooey, and perfectly indulgent texture in every single bite.
FAQs:
Q: Can I make these brown butter banana bread chocolate chip cookie bars ahead of time?
A: Yes. The cookie bars can be baked a day in advance, cooled completely, covered tightly, and stored at room temperature. Warm individual bars in the microwave before serving and add a fresh scoop of vanilla ice cream right before serving for the best warm and gooey result.
Q: Do I have to brown the butter?
A: Browning the butter is strongly recommended as it adds a deep, nutty richness that pairs absolutely beautifully with the warming banana bread flavor throughout and takes these cookie bars completely over the top. If you are short on time, melted butter works as a substitute but the flavor will be slightly different throughout.
Q: Can I use a whole egg instead of just the egg yolk?
A: The single egg yolk is what gives these cookie bars their signature soft, fudgy, and perfectly gooey center — using a whole egg will add extra moisture and result in a slightly different texture throughout. The egg yolk is strongly recommended for the best result.
Q: Can I use all granulated sugar instead of a combination of brown and granulated sugar?
A: The combination of brown sugar and granulated sugar is what gives these cookie bars their perfectly balanced sweetness and that deep, molasses-like richness that enhances the warm banana bread and brown butter flavors — using all granulated sugar will result in a slightly different flavor and texture throughout.
Q: Can I use frozen bananas instead of fresh?
A: Yes. Thawed frozen bananas work beautifully in this recipe — make sure to drain any excess liquid before mashing and measuring out the correct amount for the most consistent flavor and texture throughout.
Q: Can I use a different size pan?
A: An 8x8" square baking pan is strongly recommended for the best results and the most even thickness throughout. A 9x9" pan can be used but the bars will be slightly thinner and the baking time may need to be reduced by a few minutes throughout.
Q: Can I use a different type of chocolate?
A: Yes. Any chocolate of choice works beautifully in this recipe — dark, semi-sweet, or milk chocolate chips or chopped chocolate all work well and pair beautifully with the warm banana bread and deep nutty brown butter flavors throughout.
Q: Why do I add cornstarch to the dry ingredients?
A: The cornstarch is the secret to an incredibly soft, tender, and perfectly gooey cookie bar center — it helps tenderize the flour and creates that signature melt-in-your-mouth texture that makes these cookie bars truly irresistible throughout. Do not skip this ingredient for the best result.
Q: How do I know when the cookie bars are done baking?
A: The cookie bars are done when the edges are set and golden, the top is lightly golden brown, and a toothpick inserted into the middle comes out with no raw batter — start checking at the 25 minute mark and continue baking in 1–2 minute increments if needed throughout.
Q: Can I freeze these cookie bars?
A: Yes. Freeze individual cookie bars in a freezer-safe bag or container for up to 2 months. Thaw overnight at room temperature or in the refrigerator and warm in the microwave before serving for the best soft and gooey result throughout.
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Make sure to tag me @wellmadebykiley on Instagram and leave a review or comment if you make these brown butter banana bread chocolate chip cookie bars. Happy baking!
