Lightly spray the bottom and sides of a 9-inch square baking pan with cooking spray. Line the pan with parchment paper, leaving an overhang; lightly spray the parchment with cooking spray. Set aside. Prepare a large heatproof bowl of cold water that will accommodate the bottom of a large heavy saucepan.
Place the cream, granulated sugar, corn syrup, brown sugar, butter and espresso powder in a large, heavy saucepan. Bring the mixture to a light boil over medium-high heat, stirring until the sugars have dissolved and the butter is melted. Reduce the heat to medium and cook, stirring occasionally, until the caramel is thick and bubbling and reaches a temperature of 245 degrees F on a candy thermometer.
Remove the saucepan from the heat and immediately stir in the vanilla and salt. Cool the caramel to room temperature by placing the bottom of the pan in the prepared water bath.
Pour the caramel into the prepared baking pan and let stand, uncovered, until set, at least 8 hours.
Lift the caramel out of the pan using the parchment overhang, and slice into 1-inch cubes.
To finish, dip the bottom half of each caramel into the melted chocolate. Top with cookie crumbles. Set aside until set, about 30 minutes
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.