Beat together your butter and sugars until light and fluffy, approx 1 min. Add eggs and vanilla, mix until incorporated. On low speed add in your salt, baking soda and flour, mixing until just combined.
Melt your chocolate chips in a double boiler or microwave and spread over caramel. Put back in the fridge for at least 30 minutes or until chocolate is set. Cut into squares when ready to serve. The caramel will start to "leak out" after they sit for just a bit. It is fabulous!