Set oven 350 degrees
Add these ingredients into bowl for mixing:
6oz. soft cream cheese
5tbl. soft butter
Mix above ingredients at low speed until creamy
Put 3/4 brownie mix 13" x 9" in pan
Add all of cream cheese mix
Spoon remaining brownie mix and swirl/spread
Bake 36-39 minutes until set.
Test if it's set by sticking in a toothpick an inch away from the pan border, confirming that the toothpick comes out clean.