A rich, buttery toffee cooked to a deep amber, topped with melted chocolate and chopped almonds, then chilled and broken into crisp, candy‑shop style pieces.
Combine butter, sugar, and salt in a large, heavy-bottomed saucepan over medium heat.
Stir constantly in one direction until butter is melted, about 5 minutes.
Meanwhile, line a 9x13-inch baking dish with a sheet of parchment paper, letting it overhang two sides of the dish.
Once the butter has melted, stop stirring and bring mixture to a boil. Once boiling, cook, stirring only 2 to 3 times, until it turns a dark amber color and the temperature reaches 285 degrees F (137 degrees C) on a candy thermometer, 20 to 30 minutes.
Immediately pour toffee into the prepared baking dish. Sprinkle chocolate chips on top and let sit until they soften, 1 to 2 minutes.
Use a spatula to spread softened chocolate into a thin, even layer.
Sprinkle nuts over the chocolate and press down slightly. Spraying a little olive oil on your hands will help prevent sticking.
Place toffee in the refrigerator until set, about 1 hour. Lift hardened toffee out of the baking dish with the parchment paper.
Break into pieces and store in an airtight container.