I can’t get over how these 4 ingredient chocolate chip cookie bars turn out so thick, buttery, and melt in your mouth soft. One bite and they’ll look like the dessert everyone assumes took way more effort.

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I’m ridiculously obsessed with these Chocolate Chip Cookie Bars because they taste like the thick, buttery middle piece of every cookie I’ve ever tried to claim first. I love how the yellow or butter cake mix keeps them soft and chewy, while semisweet chocolate chips make every bite loaded and melty.

No dry edges stealing the spotlight. Just dense, sweet, chocolate-studded bars that slice up like they were made for bake sales, parties, and my own “just one more” situation.

And honestly, I adore a dessert that looks low-effort but disappears like I planned the whole thing. Big cookie energy.

Ingredients

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Cake mix keeps things easy, sweet, and soft, like a shortcut that actually works.
Melted butter brings that rich, bakery-style flavor you’ll smell before the pan cools.
Eggs help hold everything together, so the bars slice up nice and chewy.
Chocolate chips are the gooey little pockets everyone digs for first.
No judgment.
Basically, these bars taste like cookies, but with way less scooping and waiting.
Plus, the edges get a little golden while the middle stays soft and cozy.
They’re not exactly health food, but they’re the kind of treat worth sharing.

Ingredient Quantities

1 (15.25 ounce) box yellow or butter cake mix

1 cup (2 sticks or 226 grams) unsalted butter, melted and slightly cooled

2 large eggs, room temperature

1 1/2 to 2 cups semisweet chocolate chips

How to Make this

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1. Preheat oven to 350°F and line a 9×13 inch baking pan with parchment paper or lightly grease it.

2. In a large bowl combine 1 (1
5.25 ounce) box yellow or butter cake mix, 1 cup melted and slightly cooled unsalted butter, and 2 large room temperature eggs.

3. Stir the mixture with a spatula or wooden spoon until a thick, uniform dough forms and no dry streaks remain.

4. Fold in 1 1/2 cups semisweet chocolate chips, reserving up to 1/2 cup to sprinkle on top if desired.

5. Transfer the dough to the prepared pan and use a spatula or lightly oiled fingers to press it evenly into the pan, smoothing the top.

6. Sprinkle the reserved chocolate chips over the top if you set any aside.

7. Bake in the preheated oven for 18 to 25 minutes, or until the edges are golden and a toothpick inserted near the center comes out with a few moist crumbs but not raw batter.

8. Cool the pan on a wire rack for at least 30 minutes to set the bars, then lift out using the parchment and cut into squares.

Equipment Needed

1. Oven
2. 9×13 inch baking pan
3. Parchment paper or nonstick cooking spray
4. Large mixing bowl
5. Silicone spatula or wooden spoon
6. Microwave-safe bowl or small saucepan for melting butter
7. 1 cup measuring cup and measuring spoons
8. Wire cooling rack
9. Toothpick or cake tester and oven mitts

FAQ

Q: Can I use a different cake mix flavor? A: Yes. Yellow or butter gives classic results, but white, funfetti, or even spice can be used for different flavors.

Q: Can I substitute oil for the melted butter? A: You can use an equal amount of neutral oil, but texture will be less rich and slightly cake like rather than chewy.

Q: How much chocolate should I use? A: 1 1/2 cups gives a good balance. Use up to 2 cups for extra chocolate or mix in chopped nuts or white chocolate chips.

Q: What pan size and baking time are best? A: Bake in a greased 9×13 inch pan at 350 F for about 20 to 25 minutes, until edges are set and center is just set.

Q: How do I get chewy bars instead of cakey? A: Use the lower end of the chocolate amount, do not overbake, and allow bars to cool in the pan to set for a chewier texture.

Q: How should I store and how long do they keep? A: Store in an airtight container at room temperature for up to 4 days or refrigerate up to 7 days. Freeze for up to 3 months, thaw at room temperature.

Chocolate Chip Cookie Bars Recipe Substitutions and Variations

Yellow or butter cake mix: substitute 2 1/4 cups all purpose flour + 1 cup granulated sugar + 1 tablespoon baking powder + 1/2 teaspoon salt (use in place of one box cake mix)
Unsalted butter (1 cup): substitute 1 cup melted coconut oil, or 1 cup margarine, or 1/2 cup butter + 1/2 cup unsweetened applesauce to reduce fat
Eggs (2 large): substitute 1/2 cup applesauce, or 2 tablespoons ground flaxseed mixed with 6 tablespoons water (let sit 5 minutes), or 2 teaspoons commercial egg replacer + water as package directs
Semisweet chocolate chips: substitute an equal amount of chopped baking chocolate, milk chocolate chips, or peanut butter chips for variation

Pro Tips

1. Use room temperature eggs and only slightly cooled melted butter so the batter comes together smoothly and you do not overwork it. If the butter is too hot it can cook the eggs and make the texture gummy.

2. Press the dough into the pan with lightly oiled fingers instead of a spatula for an even, compact surface without compressing it too much. Oiled fingers give better control and help avoid streaks or air pockets.

3. Watch the bake time closely starting at 18 minutes. Ovens vary, and these bars go from perfectly fudgy to overbaked quickly. A toothpick with a few moist crumbs means they are ready; no wet batter.

4. For best-looking cuts and clean squares, let the pan cool fully for at least 30 minutes, then chill in the fridge for 20 to 30 minutes before slicing. Warm bars will crumble, while slightly chilled bars hold their shape.

Chocolate Chip Cookie Bars Recipe

Recipe by Sarah level

0.0 from 0 votes

Servings

servings

Calories

302

kcal

Equipment: 1. Oven
2. 9×13 inch baking pan
3. Parchment paper or nonstick cooking spray
4. Large mixing bowl
5. Silicone spatula or wooden spoon
6. Microwave-safe bowl or small saucepan for melting butter
7. 1 cup measuring cup and measuring spoons
8. Wire cooling rack
9. Toothpick or cake tester and oven mitts

Ingredients

1 (15.25 ounce) box yellow or butter cake mix
1 cup (2 sticks or 226 grams) unsalted butter, melted and slightly cooled
2 large eggs, room temperature
1 1/2 to 2 cups semisweet chocolate chips

Directions

Preheat oven to 350°F and line a 9×13 inch baking pan with parchment paper or lightly grease it.
In a large bowl combine 1 (1
25 ounce) box yellow or butter cake mix, 1 cup melted and slightly cooled unsalted butter, and 2 large room temperature eggs.
Stir the mixture with a spatula or wooden spoon until a thick, uniform dough forms and no dry streaks remain.
Fold in 1 1/2 cups semisweet chocolate chips, reserving up to 1/2 cup to sprinkle on top if desired.
Transfer the dough to the prepared pan and use a spatula or lightly oiled fingers to press it evenly into the pan, smoothing the top.
Sprinkle the reserved chocolate chips over the top if you set any aside.
Bake in the preheated oven for 18 to 25 minutes, or until the edges are golden and a toothpick inserted near the center comes out with a few moist crumbs but not raw batter.
Cool the pan on a wire rack for at least 30 minutes to set the bars, then lift out using the parchment and cut into squares.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.