Brownie base:
3.3 ounces flour
1/4 tsp salt
1/2 tsp baking powder
6 ounces milk chocolate
8 tbsp butter
1/2 cup sugar
2 tsp vanilla
3 eggs
Cream cheese filling
8 ounces cream cheese, at room temperature
1/4 cup sugar
1/2 tsp vanilla
1 egg yolk
Preheat oven to 325. Melt butter and chocolate, whip together with vanilla and sugar, then eggs (one at a time). Add dry ingredients and mix until smooth.
Mix the cream cheese, sugar, vanilla, and egg yolk in a separate bowl until smooth.
Line 8x8 pan with parchment paper and smear half the brownie batter, then spoon in half the cream cheese mixture, then repeat. Bake for 50 minutes. Eat.