Name: Classic Chocolate Chip Cookie Bars Recipe
Prep time: 20 min
Cook time: 34 min
Total time: 1 h 54 min
Cuisine: American
Ingredients: 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled); 1 teaspoon baking soda; 1 and 1/2 teaspoons cornstarch; 1/2 teaspoon salt; 3/4 cup (12 Tbsp; 170g) unsalted butter, melted and slightly cooled; 1 cup (200g) packed light brown sugar; 1/3 cup (67g) granulated sugar; 1 large egg plus 1 large egg yolk, at room temperature; 2 teaspoons vanilla bean paste; 1 cup (180g) semi-sweet chocolate chips; Optional: sprinkle of flaky sea salt

Jump to Recipe· 4.3 from 14 reviews

There is something irresistibly comforting about a rich, buttery treat packed full of melty chocolate chips, and this Classic Chocolate Chip Cookie Bars Recipe hits exactly that sweet spot. These bars combine the best of chewy cookies with the ease of bars, making them a perfect go-to for when you want something homemade but fuss-free. Whether you’re sharing with friends, packing for school lunches, or just craving a nostalgic indulgence, these cookie bars deliver all the gooey, golden goodness you want in every bite.

Ingredients You’ll Need

A clear glass bowl filled with light beige cookie dough mixed with many small dark chocolate chips, showing a soft and slightly sticky texture with the chocolate chips evenly spread inside. A pale blue spatula with a white handle is partially inserted into the dough, resting on the right side inside the bowl. The bowl is set on a white marbled surface, creating a clean and bright look. Photo taken with an iphone --ar 4:5 --v 7

Get ready with a handful of simple pantry staples that come together to create the magic of these cookie bars. Each ingredient plays a crucial role, from the rich butter lending moisture and flavor, to the perfect balance of sugars bringing sweetness and chew, to the chocolate chips that give every bite a delicious surprise.

All-purpose flour (2 and 1/4 cups): The base of the cookie bars, giving them structure and that tender crumb.
Baking soda (1 teaspoon): Helps the bars rise and get a light, slightly cakey texture without drying out.
Cornstarch (1 and 1/2 teaspoons): Adds an extra layer of softness and chewiness to the bars.
Salt (1/2 teaspoon): Enhances all the flavors and balances the sweetness perfectly.
Unsalted butter (3/4 cup, melted): Brings richness and moisture so the bars stay soft and tender.
Light brown sugar (1 cup, packed): Adds deep caramel notes and moisture for chewy texture.
Granulated sugar (1/3 cup): Provides sweetness and aids in creating golden edges.
Large egg plus 1 egg yolk: Eggs bind the dough and add richness, with extra yolk boosting softness.
Vanilla bean paste (2 teaspoons): Offers warm, fragrant flavor far beyond plain vanilla extract.
Semi-sweet chocolate chips (1 cup): The star ingredient, giving luscious pockets of melty chocolate.
Optional flaky sea salt: A little sprinkle on top enhances sweetness and adds a gourmet touch.

How to Make Classic Chocolate Chip Cookie Bars Recipe

Step 1: Prepare Your Pan and Oven

First things first, preheat your oven to a cozy 350°F (177°C) and line a 9-inch square baking pan with parchment paper. Leaving extra paper around the edges makes lifting out the bars a breeze once baked and cooled, so don’t skip this simple step. This preparation ensures an even bake and easy cleanup, two things every home baker appreciates.

Step 2: Mix the Dry Ingredients

In a large bowl, whisk together the flour, baking soda, cornstarch, and salt. This dry mixture lays the foundation of your bars’ texture. The cornstarch is a secret ingredient that strikes the perfect balance, keeping the bars tender but still holding their shape beautifully.

Step 3: Combine the Wet Ingredients

Take a medium bowl and whisk melted butter with both sugars until no lumps remain. Then add the large egg, extra egg yolk, and vanilla bean paste. Expect the mixture to turn thick and luscious—that richness is exactly what will make your cookie bars so decadent. Pour this wet mixture into the dry and stir until just combined. The dough will feel soft and slightly slick due to the melted butter, but be sure to fold in the chocolate chips gently to spread them evenly without losing the dough’s texture.

Step 4: Press the Dough into the Pan

Transfer your cookie dough into the prepared pan and press it down evenly. If you love a little surprise, sprinkle a light layer of flaky sea salt on top and press a few extra chocolate chips across the surface. This not only looks stunning but adds a delightful contrast when you bite in.

Step 5: Bake to Perfection

Pop the pan into the oven and bake for 30–34 minutes. Keep a close eye toward the end: you want the edges to turn a pretty golden brown but avoid over-baking so the bars remain soft and chewy instead of cakey. A toothpick inserted near the center should come out mostly clean but still with a tiny bit of moisture clinging on.

Step 6: Cool and Cut

Once baked, let the bars cool in the pan on a wire rack for at least one hour. This cooling step is essential—it allows the bars to set perfectly so they don’t crumble when you cut them. Then, use the parchment paper to lift out the whole slab and slice into squares that are ready to enjoy.

Step 7: Store and Enjoy

Wrap leftover bars and keep them at room temperature for up to one week. They stay deliciously soft and chewy, perfect to satisfy a sweet craving anytime.

How to Serve Classic Chocolate Chip Cookie Bars Recipe

The image shows a stack of three square chocolate chip cookie bars on a white marbled surface. Each bar has a golden-brown top layer dotted with melted dark chocolate chips, a thick, soft middle layer filled with gooey melted chocolate, and a slightly darker bottom crust. A few crumbs are scattered around the bars. In the background, there is a glass bottle of milk and a small white bowl filled with chocolate chips. The lighting is soft and natural, highlighting the warm tones of the cookie bars. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

A simple sprinkle of flaky sea salt adds a wow factor to these bars, balancing the sweetness and highlighting the chocolate’s richness. For a festive touch, dust a little powdered sugar or drizzle some melted white chocolate on top before serving.

Side Dishes

These cookie bars are fantastic on their own but pair beautifully with a scoop of vanilla ice cream for an easy dessert. Try serving alongside a cup of rich coffee or creamy hot chocolate to make every bite even more indulgent.

Creative Ways to Present

Cut into small bite-sized squares for party platters or stack a few with layers of whipped cream and berries for a quick dessert parfait. You can also sandwich ice cream between two bars for an irresistible summer treat everyone will love.

Make Ahead and Storage

Storing Leftovers

Cover leftover bars tightly with plastic wrap or store in an airtight container. At room temperature, they keep their perfect chewy texture for up to one week. This makes them a great option to bake ahead for gatherings or busy days.

Freezing

Want to keep these a little longer? Wrap individual bars tightly in plastic wrap and place them in a freezer-safe bag. They freeze wonderfully for up to three months, so you can always have a sweet treat ready whenever the craving strikes.

Reheating

To enjoy these bars warm and melty, simply microwave a square for 10–15 seconds or heat briefly in a low oven. The chocolate chips soften beautifully, bringing back that fresh-baked feeling every time.

FAQs

Can I use chocolate chunks instead of chocolate chips?

Absolutely! Chocolate chunks work wonderfully and create gooey pockets of chocolate just like chips. They can add a bit more rustic texture and fewer uniform bites, which many people love.

What is the purpose of adding cornstarch in this recipe?

Cornstarch helps make the cookie bars extra tender and soft by interfering with gluten formation in the flour. It’s a subtle ingredient that transforms the bars from ordinary to delightfully chewy and melt-in-your-mouth.

Can I substitute the butter with oil or margarine?

Butter is key to the rich flavor and texture in this recipe, so we recommend using unsalted butter melted as directed. Using oil or margarine may alter the taste and texture, making the bars less tender and flavorful.

Why do you recommend under-baking slightly?

Under-baking ensures the bars remain soft and chewy, rather than turning cakey or dry. They will continue to set as they cool, giving that perfect cookie bar texture everyone loves.

Can I double this recipe for a larger batch?

Definitely! Just double all the ingredients and bake in a larger pan, like a 9×13-inch. Watch the baking time carefully as it may need a few extra minutes to bake through evenly.

Final Thoughts

If you’re on the hunt for a crowd-pleasing dessert that feels like a hug in every bite, give this Classic Chocolate Chip Cookie Bars Recipe a try. It’s straightforward, satisfying, and downright addictive. Once you make these bars, you’ll keep going back to this recipe whenever you crave that perfect homemade cookie experience with none of the fuss.