Preheat oven to 350°F. Prepare your baking dish by criss-crossing parchment paper or spraying with non-stick cooking spray.
Prepare brownie mix according to box instructions by adding eggs, oil and water to a large mixing bowl.
Add in half of the chopped chocolate, pretzels, and chips to the batter.
Pour mix into prepared baking dish. Top with remaining sweet and salty ingredients.
Notes
Notes about thick brownies:
First, choose the correct pan size for your desired brownie thickness.If you prefer a thick brownie, bake in a smaller pan.
Note about gooey brownies:
You can easily overbake brownies. Make sure to remove when just about finished cooking or you'll end up with hard brownies. Use a toothpick to check the center.