- 1 cup granulated sugar
- 1/3 cup Scotch whisky
- 3 tablespoons unsalted butter, softened
- Pinch of salt
- Cook sugar in a dry 2-quart heavy saucepan over moderate heat, undisturbed, until it begins to melt.
- Continue to cook, stirring occasionally with a fork, until sugar is melted into a deep golden caramel.
- Remove from heat and carefully add Scotch, butter, and salt (caramel will steam vigorously and harden). Cook over moderately low heat, stirring, until caramel is dissolved.
- Cool sauce to warm.