In a saucepan, combine the sweetener, cocoa, heavy cream, butter and peanut butter.
Heat over low-medium heat to melt everything together, stirring until smooth.
Remove from heat and add vanilla and seed/nut mixture.
Press into prepared 8”x8” pan lined with parchment.
Chill in the refrigerator until firm.
Cut into desired shapes.
Store in refrigerator. (I individually wrap them so I can just grab and go.)
These will last for a couple weeks in the fridge.