Make the whipped cream: Combine the heavy cream, Fluff, almond liqueur and vanilla in the bowl of a stand mixer fitted with the whisk attachment; whip until soft peaks form.
Make the hot chocolate: Combine the whole milk and coconut milk in a saucepan over medium heat and bring to a simmer. Whisk in the cocoa powder, brown sugar, chocolate chips, vanilla and salt; cook, whisking constantly, until the sugar and chocolate melt and the mixture is smooth and thick, about 5 minutes.
Divide the hot chocolate among mugs and top with a large dollop of the whipped cream. Dust with cocoa powder and garnish with toasted coconut.