Preheat the oven to 325 degrees Fahrenheit. Prepare an 8 x 8 metal pan with parchment paper leaving an overhang on 2 sides or spray it well with cooking spray. Use metal binder clips to secure the parchment to the baking pan if desired.
Melt the butter in the microwave in 30-second increments in a medium heat-proof bowl (or use a small saucepan on the stovetop). Add the sugar and whisk well. Whisk in the eggs and vanilla.
8 tablespoons unsalted butter, 1 ¼ cup (250 grams) granulated sugar, 2 large eggs, 2 teaspoon vanilla extract
Stir in the cocoa powder and salt until combined.
¾ cup (60 grams) dutch processed cocoa powder, ¾ teaspoon kosher salt
Add the flour and stir until it’s almost fully incorporated and then stir in the chocolate chips and mix until just combined.
⅓ cup (40 grams) all-purpose flour, ½ cup (85 grams) semi-sweet chocolate chips
Pour the batter into the prepared pan and smooth the top.
Bake for 28-32 minutes until the brownies are set. Don't overbake as they will continue to cook out of the oven Let the brownies cool in the pan completely before frosting them. Remove the brownies using the parchment paper (slide a knife on the sides without the parchment to loosen the brownies if needed). Frost with the cream cheese frosting. Top with sprinkles if desired.