Preheat Oven to 350. Prepare glass pie tin or 8x8 pan. Grease pan or line with parchment paper.
Add sourdough discard, sugar, eggs, salt, butter, cocoa powder, flour and vanilla one bowl. Mix until well combined. Pour half of mixture into set other half aside.
Spread chocolate chips over brownie batter.
In a bowl or stand mixer whisk cream cheese, sugar, egg, and salt. Once combined, dollop spoonful's on top of chocolate chips to create the third and final layer. Fill in areas with brownie batter dollops.
Take a toothpick or knife and delicately swirl the brownie batter and cheesecake dollops.
Bake at 350 for 37-40 mins. Allow to completely cool and chill in fridge before cutting.