Prepare the Crockpot: Set your crockpot to low heat. Add the whole milk, sweetened condensed milk, and heavy cream into the slow cooker. Stir to combine.
Add the Chocolate: Pour in the semi-sweet chocolate chips and stir gently until the chocolate starts to melt into the milk mixture. Cover and cook on low for 2 hours, stirring occasionally to prevent the chocolate from burning.
Add the Extracts: After 2 hours, stir in the vanilla extract and peppermint extract. Taste and adjust the level of peppermint if you want it more minty.
Serve: Ladle the hot chocolate into mugs. Top with whipped cream and sprinkle crushed peppermint candies for an extra festive touch.
Enjoy: Sip and enjoy the cozy, indulgent flavors of your homemade peppermint hot chocolate!