01 -
Melt butter and brown sugar substitute in pot over medium heat.
02 -
Whisk mixture until brown sugar has melted completely.
03 -
Remove from heat and stir in vanilla extract.
04 -
Toss in walnuts and stir to combine.
05 -
Pour mixture onto parchment lined baking sheet and let set for 30 minutes.
06 -
Break apart walnuts and serve.