Step 1: Preheat the oven to 350°F (175°C) to ensure even baking.
Step 2: Line an 8x8 inch baking pan with parchment paper, leaving overhang for easy lifting.
Step 3: In a microwave-safe bowl, melt the unsweetened chocolate and butter in 30-second intervals, stirring until smooth. Let cool slightly.
Step 4: Whisk together white sugar and beaten eggs in a separate bowl. Add the melted chocolate mixture and stir well.
Step 5: Stir in vanilla extract and kosher salt, then fold in all-purpose flour until just combined.
Step 6: Gently fold in the cut pieces of Snickers candy bars, distributing them evenly.
Step 7: Pour the brownie batter into the prepared pan, spreading it evenly. Bake for 25-30 minutes or until a toothpick comes out with a few moist crumbs.
Step 8: Cool in the pan for 10 minutes, then lift out using parchment paper and cool completely on a wire rack. Cut into squares and enjoy!