Preheat the oven to 350°F.
In a medium bowl, mix 2 Cups all purpose flour, 1 Cup firmly packed dark brown sugar, ½ cup melted real sweet cream unsalted butter, and 1 pinch of kosher salt until evenly combined and crumbly.
Press this mixture firmly and evenly into the bottom of a 9x13-inch baking dish.
Sprinkle 1 cup of finely chopped pecans evenly over the crust.
In a saucepan over medium heat, combine 1 Cup of real sweet cream unsalted butter and ¾ Cup dark brown sugar. Stir until the butter melts and the mixture comes to a low boil; continue to boil for 1 minute, stirring constantly.
Remove the saucepan from the heat and stir in 1 teaspoon real vanilla extract and ½ teaspoon real almond extract.
Pour the hot butter–sugar mixture evenly over the crust and pecans.
Bake in the preheated oven for 20–25 minutes, until the topping is bubbling and set at the edges.
Remove the pan from the oven and immediately sprinkle 12 ounces semi-sweet chocolate chips evenly over the hot surface. Let the chips sit 1–2 minutes to soften, then use a small rubber spatula to gently swirl the chocolate for a marbled appearance.
Cool completely to room temperature (this will take several hours) before cutting into bars.