Add dry roasted peanuts to the bottom of a 2-quart slow cooker.
Add white chocolate baking bar, green candy melts, and white almond bark on top.
Lay a paper towel over the slow cooker and place the lid on top.
Cook on Low for 1 hour.
Lift lid carefully so condensation does not drip into the chocolate.
Stir until smooth and peanuts are fully coated.
Cook 10 to 15 minutes more if needed, using a fresh dry paper towel under the lid.
Scoop clusters onto parchment paper.
Press one red candy heart or red candy into each cluster.
Let set completely before storing.
Notes
Use a 2-quart crockpot or double the batch for a larger slow cooker. Do not skip the paper towel because moisture can ruin melted chocolate. Store set clusters in an airtight container at room temperature up to 4 days, or freeze up to 2 months between parchment layers.
Keyword christmas candy, crockpot candy, grinch cookies