Preheat your oven to 350°F (175°C) to ensure even baking.
In a double boiler or microwave-safe bowl, combine the chopped unsweetened chocolate and butter. Heat gently until melted and smooth, stirring occasionally.
In a mixing bowl, whisk together the white sugar and slightly beaten eggs until well combined and light.
Pour the melted chocolate and butter mixture into the sugar and egg mixture. Add vanilla extract and kosher salt, stirring until well mixed.
Gradually sift in the all-purpose flour, stirring gently until just combined; do not overmix.
Gently fold in the chopped Snickers candy bars for that delicious gooey texture.
Pour the brownie batter into a greased 9x13 inch baking pan, spreading it evenly. Bake for 25-30 minutes, or until a toothpick comes out with a few moist crumbs.
Once baked, cool in the pan for at least 15 minutes before transferring to a wire rack to cool completely before cutting into squares.
