Chill a mixing bowl and beaters in the fridge. Pour in the heavy cream and whisk until stiff peaks form, about 3-4 minutes. Set aside.

In a separate bowl, whisk together milk, cooled brewed coffee, powdered sugar, and melted chocolate until smooth, about 2-3 minutes.

Gently fold the whipped cream into the coffee-chocolate mixture in three batches. Be careful not to deflate the cream.

Divide the mixture into serving glasses and chill in the fridge for at least 2 hours until set.

After chilling, add optional toppings like cocoa powder, chocolate curls, or coffee beans before serving.