Salted Chocolate-Pecan Toffee
Use caution when working with sugar syrup, as it can cause severe burns. Set out your baking sheet so it's ready to use, and keep ice water nearby to cool any burns. Toffee keeps at room temperature in an airtight container up to 2 weeks; chilled, up to 1 month. Fleur de sel is the top layer of sea salt skimmed from seawater evaporation ponds and often has a delicious minerally flavor; find it at gourmet grocery stores.