Combine the light corn syrup and sugar, in a medium saucepan. Bring it to a boil over medium-low heat, stirring often.
Remove from heat and stir in the creamy peanut butter and heavy cream until combined.
Stir in the vanilla extract.
Video
Notes
Makes 1 3/4 cups.Allow the peanut butter topping to cool, and then store it in an airtight container in the fridge for up to a week. Reheat in the microwave.