1 part dark creme de cacao
1 part green creme de menthe
1 part Black Velvet® Canadian whisky
1 part heavy cream

Mix in the order: cacao, menthe, whiskey, milk. Try to keep the layers separate. Float on the back of a spoon, tilt the glass and pour very gently, etc.

I suggest tilting the glass. When you tilt the glass you can, when pouring the cream/milk, rotate the glass causing the cream to swirl down through the other layers which looks good. Serve in an apertif glass.