In an electric mixer with paddle attachment, combine red velvet cake mix with 1 stick butter (melted), 2 large eggs, pudding mix, and vegetable oil. Mix well (2-3 minutes).
Spray a 9x13 pan with nonstick spray. Then spread the red velvet brownie layer into the pan. It will be VERY thick, use the back of a spoon (or clean hands) to help spread it into all edges of the pan.
For cookie layer, cream together remaining 2 sticks butter (softened) and sugars with electric mixer and paddle attachment.
Add vanilla extract and eggs, one at a time, mixing well after each addition until thoroughly combined.
In a separate mixing bowl, combine flour, baking soda and salt. Add dry mixture to mixing bowl in increments and mix until just combined.
Stir in Nestlé® Toll House® DelightFulls™.
Spread cookie layer on top of red velvet batter and press down until covered completely.
Cook for 20-25 minutes or until cookie layer is golden brown on top.