Add white almond bark pieces to the bottom of the slow cooker.
Add German chocolate pieces, then semi-sweet chocolate chips.
Pour dry roasted peanuts over the top. Do not stir yet.
Lay a double layer of paper towels across the slow cooker and place the lid on top.
Cook on Low for 1 to 1 1/2 hours, checking after 45 minutes.
Stir gently with a dry spatula until chocolate is smooth and peanuts are coated.
If pieces remain unmelted, cover with fresh paper towels and cook 10 to 15 minutes more.
Scoop clusters onto parchment paper.
Let set completely before storing.
Notes
Do not skip the paper towel under the lid because condensation can make chocolate seize. Use a dry spatula and have parchment ready before scooping. Store at room temperature up to 2 weeks or freeze up to 3 months between parchment layers.
Keyword chocolate peanut clusters, crock pot peanut clusters