Melt butter and add brown sugar, stir continiously until sugar disolves and a thick brown caramel begins to form. This usually takes 6-8 minutes for me. (see video below)
When the sauce is thickened and looks like caramel remove from heat and stir in the peanut butter until melted.
Spoon into a silicone mini muffin pan and freeze for 15 minutes or until set. (This made 30 mini muffin size fudge bites for me when I filled the trays 3/4 full)
Top with sea salt as desired.
Store in freezer.
Video
Notes
Watch the video above to see exactly how to create these delicious fat bombs!Net carbs are 1.5 g per peanut butter cup