Preheat oven to 350 degrees F.

Line an 8x8" square pan with foil (this makes for the easiest clean up) and spray lightly with cooking spray.

In a large sauce pan, over low to medium heat, melt butter with sugar and brown sugar, stirring well until butter is melted and all ingredients are well combined. Remove from heat and allow to cool (at least 10-15 minutes is ideal).

In a large bowl, combine flour, baking powder, baking soda and salt.

Once butter and sugar mixture has cooled slightly (it's okay if it's still slightly warm, but you do not want it hot, or you risk cooking your eggs in it!), add in cookie butter and stir well to combine. Add in caramel sauce and stir well to combine. Add in vanilla, stir well to combine. The mixture may be thick and crumbly, that's okay. Add in eggs and stir well.

Pour wet mixture into dry mixture and stir to combine. Mix in chocolate chips. The mixture may be thick, so you will more press it into your pan than pour it into your pan.

Bake at 350 degrees for 20-25 minutes. Remove from oven.

If using extra caramel on top, use a knife, fork or even straw to create some small holes in the surface of your bars. Pour caramel sauce over the bars, focusing on getting the caramel sauce poured over the holes you have poked, which will allow it to melt into the bars and not just remain on top.

Sprinkle with sea salt.

You can dish up and serve warm, or allow it to cool which will give the caramel a chance to really settle into the bars. Serve and enjoy!