Combine sugar, water and butter in a medium saucepan over high heat and bring to a boil.
Reduce heat to low, stir in corn syrup, simmer for just 1 1/2 minutes and remove from heat.
Fold in peanut butter, marshmallow crème and vanilla and stir until well blended.
Keep stored in a lidded glass jar in the refrigerator. It will get rather hard after refrigerating so bring the amount you want to use to room temperature before using.
By Deeli from Richland, WA
Oh yummy! It may never get to the jar.