Triple Layer Cookie–Oreo–Brownie Bars : Ultra Gooey & Irresistible

These Triple Layer Cookie–Oreo–Brownie Bars are the ultimate dessert mashup, soft chocolate chip cookie dough on the bottom, Oreo cookies in the center, and a fudgy brownie layer on top. Every bite is gooey, chocolatey, and outrageously delicious. This recipe is fully tried-and-tested and guaranteed to wow at parties, potlucks, or weekend baking sessions.

📋 Ingredients

Cookie Layer

½ cup (1 stick) unsalted butter, softened
½ cup granulated sugar
½ cup brown sugar
1 large egg
1 teaspoon vanilla extract
1 ¼ cups all-purpose flour
½ teaspoon baking soda
¼ teaspoon salt
1 cup chocolate chips

Middle Layer

16 Oreo cookies (or any chocolate sandwich cookie)

Brownie Layer

1 box brownie mix (18–20 oz) + ingredients listed on the box
OR homemade:
- ½ cup melted butter
- 1 cup sugar
- 2 large eggs
- ½ cup cocoa powder
- ¾ cup flour
- ½ teaspoon salt
- ½ teaspoon baking powder

🍫 Instructions

Preheat oven to 350°F (175°C). Line an 8×8 or 9×9 inch baking pan with parchment paper.

Make the cookie layer:
Beat the butter and sugars until creamy. Mix in the egg and vanilla. Add flour, baking soda, and salt; stir just until combined. Fold in chocolate chips. Press the cookie dough evenly into the bottom of the pan.

Add the Oreo layer:
Arrange the Oreo cookies in a single layer over the cookie dough.

Make the brownie layer:
Prepare your boxed brownie batter or whisk together the homemade brownie ingredients. Pour the brownie batter evenly on top of the Oreo layer.

Bake for 35–40 minutes, until the top is set but still slightly soft in the center. Cool for at least 30 minutes before cutting, the layers will hold together beautifully.

💡 Tips

Line the pan with parchment for easier removal. For extra gooey bars, underbake by 2–3 minutes. Add caramel drizzle on top after baking for a richer finish. These bars freeze well for up to 2 months.