Combine sugar, butter, milk and salt in a heavy 3 qt sauce pan. Bring to full boil over high heat stirring constantly.

Reduce heat to medium and continue to stir for 5 minutes. Remove from heat.

Stir in peanut butter until fully melted.

Add vanilla and fluff, beat until well blended and fluff is fully melted.

Fold in candy immediately. Spread in a 13x9 inch baking pan, greased or lined with parchment paper.

Cool at room temperature (2-3 hrs) or place in fridge to cool (1-2 hrs).

Store in airtight storage container in fridge for freshness.