Step 1

Preheat oven to 350 degrees F.

Step 2

Grease an 8x8 nonstick square pan with cooking spray, then line with a parchment sling. Set aside.

Step 3

Place brownie mix, oil, buttermilk, eggs, instant coffee, vanilla, and salt into a large bowl.

Step 4

Stir until well combined.

Step 5

Fold in chocolate chips/chunks.

Step 6

Pour batter into prepared pan, then top with additional chocolate chips/chunks, if desired.

Step 7

Bake in preheated oven for 40-45 minutes (an inserted toothpick should come out kind of gooey).

Step 8

Optional - top with maldon sea salt.

Step 9

Let cool in the pan for 30 minutes, then remove, cut into squares, and enjoy!