Preheat oven to 350°F and line springform pan with parchment
Prepare brownie batter with oil and eggs according to package directions
Pour into pan and bake 20-25 minutes until just set
Let brownie crust cool completely while preparing filling
Beat room temperature cream cheese until smooth and fluffy
Add sugar, eggs, sour cream and vanilla, mix until smooth
Pour cheesecake mixture over cooled brownie crust
Place in water bath and bake at 325°F for 45-50 minutes
Cool in oven with door cracked for 1 hour
Refrigerate overnight until completely set and firm
Heat sugar in saucepan until amber colored and melted
Whisk in cream, butter, vanilla and salt until smooth
Pour cooled caramel over chilled cheesecake
Top with brownie chunks and serve immediately