Step 1: Prepare Your Baking Sheet

1. Line a baking sheet with parchment paper.
2. Spread half of the crushed potato chips evenly over the parchment paper.

Step 2: Make the Toffee

1. In a heavy-bottomed saucepan over medium heat, melt the butter.
2. Stir in the sugar and salt, stirring constantly until the mixture reaches 300°F (hard crack stage) on a candy thermometer.
3. Remove from heat and stir in the vanilla extract.

Step 3: Assemble the Toffee

1. Quickly pour the hot toffee mixture over the crushed potato chips, spreading it evenly with a spatula.
2. Sprinkle the chocolate chips on top while the toffee is still hot, allowing them to melt.
3. Spread the melted chocolate evenly over the toffee.
4. Sprinkle the remaining potato chips and nuts (if using) over the chocolate.

Step 4: Cool and Break Into Pieces

1. Allow the toffee to cool completely at room temperature or place it in the refrigerator for faster setting.
2. Once hardened, break into bite-sized pieces and enjoy!