Stir in peanut butter. Add a pinch of salt or other mix-ins as desired.
Store in an airtight container at room temperature until ready to use. If it's too thick, microwave for a few seconds to loosen it up. Drizzle over ice cream.
Notes
This recipe as written isn't very sweet, but it's a nice way to balance ice cream. If you would like it a little sweeter, stir in a teaspoon or two of honey or maple syrup.