This 15-minute DIY version of a soda-shop favorite puts the butter back in butterscotch. Just add toasted pecans or smoked almonds for a killer sundae.
Chill leftovers, covered for up to 1 week. Reheat if desired. Place any leftovers in a small microwave-safe bowl. Microwave on 100% (high) power for 30 to 45 seconds or until just warm, stirring once.