01 -
Add whole milk, double cream, semi-sweet chocolate, milk chocolate, cocoa powder, and sugar to the slow cooker. Stir thoroughly to incorporate the cocoa and dissolve the sugar.
02 -
Cover and cook on low heat for 2 hours, stirring every 30 minutes to ensure the chocolate melts evenly and the mixture remains smooth.
03 -
After 2 hours, stir in the vanilla extract. Whisk well to blend. Serve immediately, or keep warm on the 'keep warm' setting if desired.
04 -
Ladle hot chocolate into mugs and garnish as desired with whipped cream, miniature marshmallows, chocolate sauce, or crushed candy canes.