These super easy oatmeal chocolate chip cookie bars are soft, chewy, and so delicious! The perfect fast fix for any cookie craving!
There is absolutely nothing better than an ooey, gooey, warm cookie bar resplendent with a healthy amount of chocolate chips. This Oatmeal Chocolate Chip Cookie Bar recipe stands out as one of my all-time favorites, offering a delightful combination of classic flavors and a wonderfully satisfying texture that keeps everyone coming back for more. Forget the fuss of individual cookies; these bars deliver maximum flavor with minimal effort.
Crafting the Perfect Easy Cookie Dough
The foundation of these outstanding oatmeal chocolate chip cookie bars lies in their incredibly simple dough. Thanks to the use of melted butter, the dough comes together effortlessly, often in just one bowl, requiring no special equipment like a stand mixer. This means less cleanup and more time to enjoy your delicious creation. The minimal fuss involved makes this recipe a go-to for busy weeknights or unexpected cravings, delivering an exceptional result every single time.
The secret to the perfect texture and flavor lies in a balanced combination of wet and dry ingredients:
Essential Wet Ingredients:
- Melted Butter: Unlike softened butter, melted butter contributes to a chewier, denser bar, preventing a cakey texture. It also makes the dough incredibly easy to mix by hand.
- Granulated Sugar & Brown Sugar: The combination of both sugars is key. Granulated sugar provides crispness and sweetness, while brown sugar adds moisture, depth of flavor (thanks to molasses), and that irresistible chewiness we all love in a great cookie bar.
- Whole Egg + Extra Egg Yolk: The whole egg binds the ingredients, but the additional egg yolk is a game-changer. It significantly enhances the richness and contributes to an incredibly tender and chewy texture, elevating these bars far beyond a standard cookie.
- Baking Soda & Salt: Baking soda helps the bars spread and rise slightly, creating a soft crumb, while salt balances the sweetness and brings out the full flavor of the chocolate and oats.
- Vanilla Extract: A crucial flavor enhancer, vanilla adds warmth and depth, complementing the chocolate and oats beautifully. Don’t skip it!
To truly level up the deliciousness of these bars, consider browning the butter. This simple step adds a nutty, rich, and complex flavor profile that will transform your cookie bars. Just be sure to let it cool slightly before incorporating it into the other ingredients. Once you try browned butter, you may find it hard to go back to regular melted butter!
Crucial Dry Ingredients:
- All-Purpose Flour: The primary structural component, providing the right consistency for the dough.
- Oats (Quick or Old-Fashioned Rolled Oats): Oats are what give these bars their signature texture and hearty flavor. Quick oats will result in a slightly softer bar, while old-fashioned rolled oats will offer a more pronounced chew. Both work wonderfully, so choose what you prefer or have on hand.
- Chocolate Chips: The star of the show! Semisweet chocolate chips are a timeless choice that offers a perfect balance of sweetness and a hint of bitterness. However, feel free to get creative! Dark chocolate chunks, milk chocolate chips, or even a mix of different varieties (like white chocolate with semisweet) can all create unique and delicious results. You do you!
Once you have your ingredients ready, it’s time to bring them together. The beauty of this recipe is its simplicity. Just mix the wet ingredients until thoroughly combined, then gently fold in the dry ingredients. Don’t overmix the dough once the flour is added; overmixing can lead to tough bars. Stir just until everything is incorporated. It’s so easy, so fast, you might blink and miss how quickly this delightful dough comes together!
Baking Perfection: Tips for Success & Doubling the Recipe
Once your dough is ready, press it evenly into a prepared 9×13-inch baking pan. The most crucial tip for achieving perfectly soft and chewy cookie bars is to avoid overbaking. These bars are truly at their best when they are just slightly underbaked. Look for golden-brown edges and a center that still looks a little soft; it will continue to set as it cools. Overbaking will result in dry, crumbly bars, so keep a close eye on them!
Planning for a larger crowd or just want extra treats? This recipe doubles beautifully! A double batch of these delightful bars can be baked in a half sheet pan, which typically measures around 11×17 inches. This makes them ideal for parties, potlucks, or simply stocking your freezer with delicious homemade goodness.
Contrary to popular belief, when doubling a recipe, you don’t necessarily need to double the baking time. In fact, due to the increased surface area in a larger pan like a half sheet pan, a double batch might even require slightly less baking time than expected. Always start checking for doneness a few minutes earlier than the single batch’s recommended time and rely on visual cues (golden edges, slightly soft center) to determine when they’re ready.
Freezing and Storing Your Delicious Cookie Bars
These oatmeal chocolate chip cookie bars are undeniably delicious straight from the oven, warm and gooey, or enjoyed at room temperature on the day they’re made. However, one of their many advantages is how wonderfully they store, making them an excellent candidate for making ahead or enjoying over several days (or weeks!).
For short-term storage, baked and cooled cookie bars can be kept in an airtight container at room temperature for up to 3-4 days. For slightly longer, they also keep well in the refrigerator for 2 to 3 days. To freshen them up and bring back that just-baked warmth, a quick 5-10 second stint in the microwave works wonders, making the chocolate chips melty and the bars soft again. Or, if you prefer, they are equally delightful enjoyed cold directly from the fridge!
For longer preservation, these cookie bars freeze exceptionally well. Once completely baked and cooled, cut the bars into individual squares. I recommend layering them in freezer-safe resealable bags or shallow, airtight containers, separating layers with parchment paper to prevent sticking. They can be frozen for up to several months. When ready to enjoy, you can thaw them at room temperature or warm them gently in the microwave for a warm, comforting treat. Having a stash of these in the freezer means you’re always just minutes away from a homemade delight.
A Timeless Favorite: Why These Cookie Bars Shine
While I adore a classic old-fashioned oatmeal chocolate chip cookie, there’s something truly brilliant and undeniably delicious about baking the dough in bar form. The consistency is often more uniform, the serving is effortless, and the texture, with its soft interior and slightly crisp edges, is simply divine. These Oatmeal Chocolate Chip Cookie Bars have been a beloved staple in my kitchen for decades, and for good reason.
They are the ultimate crowd-pleaser, perfect for school lunches, after-dinner treats, parties, or just a cozy evening in. Their comforting flavor and satisfying chew appeal to all ages, and the ease of preparation makes them a favorite for both novice and experienced bakers alike. But don’t just take my word for it; hear what others have to say:
Liz M.: “My 12-year-old has made these twice in the last week all by herself. They came out amazing! The second time she kicked it up a notch with browned butter. I didn’t even know she knew how to brown butter! Thank you for this amazing recipe!” – This testimonial highlights the recipe’s simplicity and adaptability, even for young bakers!
Cyndi B.: “Hi Mel, just letting you know that today is my third time making these. We recently had visitors from Germany and I made these. The kids literally fought over the last bar! This recipe was a big, big hit. Also, I added some nuts last time and they were great. Thanks Mel, you rock.” – A true testament to their universal appeal and deliciousness, with a great suggestion for variation!
Samantha J.: “Delicious! I doubled the recipe and used a combination of bittersweet and white chocolate chips. Everyone raved about them at our neighborhood cookout.” – This feedback reinforces the recipe’s scalability and its ability to impress at social gatherings, along with an excellent idea for chocolate chip variations.
These heartwarming stories underscore the joy and satisfaction this recipe brings. Whether you’re a seasoned baker or just starting, these bars are a foolproof way to bring smiles to faces.
Oatmeal Chocolate Chip Cookie Bars Recipe
Yield: 24 Bars (from a 9×13-inch pan)
Prep Time: 20 minutes
Cook Time: 18-20 minutes
Total Time: 40 minutes
Rating: 4.78 stars (48 ratings)
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Ingredients
- ¾ cup (170 g) butter, melted
- ½ cup (106 g) granulated sugar
- ½ cup (106 g) lightly packed brown sugar
- 1 large egg
- 1 large egg yolk
- 1 teaspoon vanilla extract
- 1 teaspoon baking soda
- ¼ teaspoon salt
- 1 ½ cups (213 g) all-purpose flour
- 1 cup (100 g) quick oats or old-fashioned rolled oats
- 2 cups (340 g) chocolate chips or chocolate chunks
Instructions
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Preheat your oven to 350 degrees F (175°C). Lightly grease a 9×13-inch baking pan with cooking spray, or line it with parchment paper and then lightly grease the parchment. Set aside.
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In a large mixing bowl, combine the melted butter, granulated sugar, brown sugar, whole egg, egg yolk, vanilla extract, baking soda, and salt. Mix thoroughly by hand with a whisk or spatula, or use an electric mixer on low speed, until all ingredients are well-combined and the mixture is smooth.
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Add the all-purpose flour, oats (quick or old-fashioned), and chocolate chips to the wet ingredients. Mix until just evenly combined. Be careful not to overmix the dough once the flour is added, as this can result in tougher bars.
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Press the cookie dough evenly into the prepared 9×13-inch baking pan. Ensure the dough is spread from edge to edge for even baking.
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Bake for 18-20 minutes. Remember, these bars are best when slightly underbaked, as they will continue to set as they cool. Look for lightly golden edges and a center that still appears soft.
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Once baked, remove the pan from the oven and let the bars cool completely on a wire rack before cutting them into squares. Cooling completely ensures they are perfectly chewy and hold their shape when sliced.
Notes
Butter: To elevate the flavor, try browning the butter first. It adds an amazing depth of nutty flavor! Always let it cool slightly before mixing. I typically use salted butter for baking, as it enhances the flavors beautifully.
Doubling: This recipe scales up perfectly! For a double batch, use a half sheet pan (approximately 11×17-inch rimmed baking sheet). Remember that a larger pan with more surface area might require a slightly shorter baking time than expected, so start checking earlier.
Update: The original recipe for these bars, published in 2008, used 1 ¾ cups of flour. Through extensive testing over the years, I’ve found that reducing the flour to 1 ½ cups results in significantly softer and chewier bars, which is how I’ve updated the recipe for optimal deliciousness.
Author: Mel
Course: Dessert
Cuisine: American
Method: Bake
Nutrition Information (per 1 Bar serving):
- Calories: 185kcal
- Carbohydrates: 24g
- Protein: 2g
- Fat: 9g
- Saturated Fat: 6g
- Cholesterol: 33mg
- Sodium: 129mg
- Fiber: 1g
- Sugar: 14g
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Recipe Source: Adapted from Mel’s Kitchen Cafe
Recipe originally published June 2008; updated March 2024 with new photos, expanded recipe notes, and refined ingredient amounts for optimal texture and flavor.
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