Store fudge in an airtight container, using parchment between layers if stacking. Keeps in the fridge for up to 2 weeks, or freeze up to 3 months. For easy variations, use walnuts or pecans, swap golden syrup for light corn syrup, or lightly sprinkle flaky salt on top before chilling. Honey may be used in a pinch instead of syrup, but flavor will differ.