Preheat your oven to 350 degrees Fahrenheit.
Put 8 tbsp melted butter in a bowl with 3/4 cup granulated sugar and 1/2 cup brown sugar. Use an electric hand mixer to combine.
Add the 2 eggs and 1 tsp vanilla and mix to combine.
Put 8 oz chocolate chips in a microwave-safe bowl. Microwave in 20 second increments, mixing between each round. Microwave until fully melted, normally 3-4 rounds in total.
Add the melted chocolate into the butter/sugar combination. Use a rubber spatula to combine.
Sift in 3/4 cup flour, 1/4 cup cocoa powder, and 1/2 tsp salt. Use your rubber spatula to mix until combined.
Grease an 8x8 glass pan with nonstick spray.
Cook for about 45 minutes depending on desired doneness. Your brownies are done when a toothpick inserted in the middle comes out clean. I like my brownies slightly fudgy without hard edges, so I normally take them out when there's still a teeny amount of batter on the toothpick ;)