Heat the heavy cream in a saucepan over low heat until it is warm and slightly steaming. Do not let it boil or bubble.

Add the milk and dark chocolate in small batches, stirring slowly as it melts. The mixture should start turning smooth and glossy.

Keep the heat low and steady to avoid burning or grainy texture. Stir often for even melting.

Once the chocolate is fully melted, continue stirring until it looks thick and silky. It should coat the spoon easily.

Add peanut butter and mix until fully blended for a rich, nutty flavor.

Turn off the heat and stir in vanilla extract for a smooth finish.

Transfer the fondue into a warm fondue pot or slow cooker set to “warm.”

Serve immediately with fruit, cookies, marshmallows, or cake pieces.