CAFE DIABLO: Prepare Cafe Mexicano; keep hot in saucepan after straining. Heat brandy just until warm in small, long-handled saucepan. Remove from heat; ignite. Pour flaming brandy over coffee. Allow flame to burn out; stir. Pour coffee into cups or mugs. Top each with whipped cream and 1 T liqueur. Garnish with cinnamon stick, if desired.