Triple Decker Bars are three delicious layers of fudgy brownies, golden butterscotch blondies and Oreo cookies all in one dessert bar.
![Triple Decker Bars recipe from RecipeGirl.com side view of triple decker bars](https://www.recipegirl.com/wp-content/uploads/2023/12/Triple-Decker-Bars-1.jpeg)
![Triple Decker Bars recipe from RecipeGirl.com ingredients displayed for making triple decker bars](https://www.recipegirl.com/wp-content/uploads/2023/12/Triple-Decker-Bars-2.jpeg)
🛒 Ingredients Needed:
- unsalted butter
- semisweet chocolate
- granulated white sugar
- eggs
- all purpose flour
- unsweetened cocoa powder
- light brown sugar
- vanilla extract
- baking soda and salt
- butterscotch chips
- OREO’s
![Triple Decker Bars recipe from RecipeGirl.com four photos showing how to make triple decker bars](https://www.recipegirl.com/wp-content/uploads/2023/12/Triple-Decker-Bars-3.jpeg)
✏️ How to make Triple Decker Bars:
*The complete, printable recipe is in the recipe card at the end of this post.
Preheat the oven to 350℉. Line a 9×13-inch pan with foil or parchment paper, leaving a 2-inch overhang on two sides. Spray with nonstick spray.
PREPARE THE BROWNIE BATTER:
In a large saucepan over low heat, combine the butter and chocolate. Stir occasionally, until melted. Remove from heat and let cool slightly. Add the sugar and eggs to the chocolate mixture and stir with a whisk. Add the flour, cocoa powder and salt, and whisk until combined.
PREPARE THE BLONDIE BATTER:
In a large bowl, use a whisk to combine the melted butter, brown sugar, eggs and vanilla. Stir in the flour, baking soda and salt. Then stir in the butterscotch chips.
ASSEMBLE AND BAKE:
- Use a rubber spatula to spread the brownie batter evenly in the pan. Press a single layer of cookies into the top of the brownie batter. Then carefully spoon the blondie batter on top and spread to cover evenly.
- Bake until a toothpick inserted into the center of the bars comes out clean, 50 to 55 minutes. Remove the pan from the oven and let the bars cool completely.
- Lift the bars out of the pan using the overhanging foil/parchment, then peel it off. Cut into squares.
![Triple Decker Bars recipe from RecipeGirl.com triple decker bars on their side to see layers](https://www.recipegirl.com/wp-content/uploads/2023/12/Triple-Decker-Bars-5.jpeg)
➡️ Tips and Substitutions:
- There are different flavors of OREO’s. I might like these with the golden OREO’s!
- Sub any kind of chips to add in the blondie mixture.
- It’s okay to sub bittersweet, milk or dark chocolate for the semisweet.
![Triple Decker Bars recipe from RecipeGirl.com hand holding two triple decker bars](https://www.recipegirl.com/wp-content/uploads/2023/12/Triple-Decker-Bars-6.jpeg)
✔️ How to store:
Store these triple decker bars in a sealed container at room temperature for 3 to 4 days. It’s okay to freeze them as well for up to three months.
![Triple Decker Bars recipe from RecipeGirl.com triple decker bars stacked on platter](https://www.recipegirl.com/wp-content/uploads/2023/12/Triple-Decker-Bars-7.jpeg)
❤️ What I Love About This Recipe:
- You get 3 desserts in one bar!
- They are visually appealing.
- Everyone loves them!
![Triple Decker Bars recipe from RecipeGirl.com triple decker bars one with bite taken out](https://www.recipegirl.com/wp-content/uploads/2023/12/Triple-Decker-Bars-8.jpeg)
Triple Decker Bars
Recipe Details
Ingredients
BROWNIES:
- 1 cup (2 sticks) unsalted butter
- 4 ounces chopped semisweet chocolate
- 2 cups granulated white sugar
- 4 large eggs
- 1½ cups all purpose flour
- ⅓ cup unsweetened cocoa powder
- ½ teaspoon salt
BLONDIES:
- 1 cup (2 sticks) unsalted butter, melted and cooled
- 2 cups packed light brown sugar
- 2 large eggs
- 1 tablespoon vanilla extract
- 2½ cups all purpose flour
- ¼ teaspoon baking soda
- ¼ teaspoon salt
- 1½ cups butterscotch chips
MIDDLE LAYER:
- 30 whole creme filled chocolate sandwich cookies (such as OREOS)
Instructions
- Preheat the oven to 350℉. Line a 9×13-inch pan with foil or parchment paper, leaving a 2-inch overhang on two sides. Spray with nonstick spray.
PREPARE THE BROWNIE BATTER:
- In a large saucepan over low heat, combine the butter and chocolate. Stir occasionally, until melted. Remove from heat and let cool slightly. Add the sugar and eggs to the chocolate mixture and stir with a whisk. Add the flour, cocoa powder and salt, and whisk until combined.
PREPARE THE BLONDIE BATTER:
- In a large bowl, use a whisk to combine the melted butter, brown sugar, eggs and vanilla. Stir in the flour, baking soda and salt. Then stir in the butterscotch chips.
ASSEMBLE AND BAKE:
- Use a rubber spatula to spread the brownie batter evenly in the pan. Press a single layer of cookies into the top of the brownie batter. Then carefully spoon the blondie batter on top and spread to cover evenly.
- Bake until a toothpick inserted into the center of the bars comes out clean, 50 to 55 minutes. Remove the pan from the oven and let the bars cool completely.
- Lift the bars out of the pan using the overhanging foil/parchment, then peel it off. Cut into squares.