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Nana’s Caramel Toffee Cookie Dough Brownie Bars

A high-prestige masterclass in multi-layered architectural baking. By utilizing a "Slab Method" to stack a golden oat-chocolate chip cookie base, a stabilized molten caramel center, and a rich fudgy brownie crown, we achieve a decadent, multi-generational dessert designed for abundant family gatherings.
Print Recipe
Prep Time 20 minutes
Cook Time 25 minutes
Total Time 45 minutes
Servings: 24 bars
Ingredients Method

Ingredients
  

The Molten Caramel Center
  • 11 ounces caramels unwrapped
  • 14 ounces sweetened condensed milk 1 can
  • 4 tablespoons unsalted butter
The Cookie Dough Foundation
  • 2 ¼ cups unbleached all-purpose flour
  • ½ teaspoon baking soda
  • ¼ teaspoon kosher salt
  • 1 cup unsalted butter softened (2 sticks)
  • ¾ cup dark brown sugar
  • ½ cup granulated sugar
  • 2 large eggs
  • 2 teaspoons pure vanilla extract
  • 1 cup old-fashioned rolled oats
  • 1 cup semi-sweet chocolate chips
  • 1 cup caramel toffee chips
The Brownie Crown
  • 18.9 ounces premium brownie mix 1 box
  • Eggs and oil as required by box directions for fudgy texture

Method
 

Technical Preparation
  1. Preheat the oven to 350°F.
  2. Coat a 10 x 15-inch shallow baking dish with vegetable oil spray.
  3. Line the dish with unbleached parchment paper, allowing for an overlap on the sides to facilitate a clean lift.
  4. Spray the parchment surface lightly.
Developing the Caramel Emulsion
  1. In a medium stainless steel saucepan over medium-low heat, combine the caramels, 4 tablespoons of butter, and sweetened condensed milk.
  2. Stir continuously for approximately 5 minutes until the caramels are entirely melted and the emulsion is smooth and glossy.
  3. Remove from heat and set aside.
The Cookie Dough Build
  1. In a ceramic bowl, whisk together the flour, baking soda, and salt.
  2. Utilizing an electric mixer, cream 1 cup of butter with both sugars until the mixture is smooth and fluffy.
  3. Incorporate the eggs and vanilla, then add the dry flour mixture until just combined.
  4. Gently fold in the oats, chocolate chips, and caramel toffee chips to ensure even distribution.
The Brownie Preparation
  1. In a separate bowl, prepare the brownie batter according to the manufacturer’s directions for a "fudge-like" consistency.
Architectural Slab Assembly
  1. Press the cookie dough batter firmly into the bottom of the prepared baking dish to create a uniform foundation.
  2. Pour the warm molten caramel emulsion evenly over the dough layer.
  3. Finish by spreading the brownie batter over the caramel, ensuring it reaches the edges to seal the center.
The Thermal Execution
  1. Bake for 20 to 25 minutes until the brownies begin to set and the edges are slightly firm.
  2. For thicker bars in a 9x13-inch dish, increase the bake time by 5 to 10 minutes.
  3. Allow the slab to cool completely in the pan on a wire rack before utilizing the parchment overlap to lift and cut into 24 uniform bars.