For filling, beat corn syrup, brown sugar, vanilla and reserved cake mix until blended.
Pecan cake mix bars.
Preheat oven to 350 degrees.
In medium bowl, beat remaining 2 eggs, the cream cheese and powdered sugar with electric mixer on medium speed until smooth.
Stir in chopped pecans and english toffee bits.
Drizzle in the melted caramel.
Add eggs and melted butter;
In large bowl, stir cake mix, pecans, butter and 1 of the eggs with spoon until well blended.
Pour over base in the dish.
Mix cake mix, water, oil and eggs in large bowl with mixer on medium speed or beat vigorously by hand 2 minutes.
Pour over cake mix base.
Remove 15 perfect pecan halves and set them aside.
Press mixture in bottom of pan.
Heat oven to 350°f for shiny metal or glass pan or 325°f for nonstick pan.
Of dry cake mix for filling.
Blend with an electric mixer on low speed for 2 minutes.
Mix with a hand mixer or stand mixer on low until blended.
In the bowl of a stand mixer, beat together the cream cheese, 2 remaining eggs, and the powdered sugar until well combined.
Add the reserved 1 cup cake mix and stir until well blended.
Press this mixture into the bottom of a lightly greased 9 x 13 baking dish.