Preheat oven to 350F and grease 9x13 metal baking dish with non-stick spray.

In a bowl, whisk together cocoa powder, chocolate chips, and instant coffee powder.

Melt butter in separate dish and immediately pour hot butter on top of chocolate mixture. Stir until all melted. If chips aren't melting, place in microwave in 15 second increments until totally melted. Set aside.

In a large bowl, using a hand mixer or stand mixer, beat together white sugar, brown sugar, eggs, and vanilla for 5-6 minutes or until fluffy, thick, and creamy. Slowly beat in chocolate mixture until all combined.

Using a spatula, mix in flour and salt slowly until all combined and no flour pockets left. Fold in remaining chocolate chips.

Pour into prepared baking dish spreading to edges with spatula. Bake for 22-24 minutes or until set. Let cool for an hour before cutting into.