01 -
Preheat oven to 350°F (175°C). Spray a 9x13-inch baking dish with nonstick cooking spray.
02 -
Using an electric mixer or stand mixer, combine 1 ½ cups salted butter and 1 ½ cups sugar, mixing until fluffy. Add 2 large eggs and 1 Tablespoon vanilla extract, then stir in 1 teaspoon baking soda and 1 teaspoon cream of tartar.
03 -
Gradually mix in 4 cups of all-purpose flour until just combined, ensuring no white bits remain. Avoid overmixing. Stir in 2 cups of chocolate chips by hand. This will take a few minutes as the batter will be stiff.
04 -
In a separate bowl, whisk together 11-ounce jar of caramel sauce and ¼ cup all-purpose flour until fully combined.
05 -
Press half of the cookie dough into the bottom of the prepared baking dish, ensuring it reaches halfway up the sides. Use hands lightly greased with nonstick spray for ease. Pour the caramel mixture over the dough layer.
06 -
Drop spoonfuls of the remaining dough evenly over the caramel layer to cover it.
07 -
Bake for 25-35 minutes or until the top is golden brown. Cool completely before cutting into bars.