In a large mixing bowl, brownie mix, eggs, oil, water and mix until combined.
Use a spatula to spread half of the batter in a rectangle pan (Dimensions: 9x13) that's been lined with aluminum foil and greased with oil.
Bake the layer for 12-15 minutes at 350 degrees F until the top is firm and brownie is partially baked.
While that's baking, add caramels, condensed milk, butter in a mixing bowl and heat in microwave, mixing often, until mixture is smooth. It should be thick. You can also add a little sea salt to make salted caramel, if you like.
Remove the partially baked brownie from the oven.
Pour the caramel mixture over the brownie and spread it with a spatula.
Let it set for 5-10 minutes so that it becomes slightly firm.
Spread remaining brownie batter on top of the caramel layer, slowly and gently, being careful not to push it into the caramel layer.
Sprinkle chocolate chips on top.
Bake again at 350 degrees F for 20-25 minutes, or until an inserted toothpick in the center comes out mostly clean with a few sticky crumbs.
Let it chill in the fridge for 1-2 hours so that it becomes firm, making it easy to cut perfect, even slices. Enjoy!