Measure out in a shot glass one shot of creme de menthe. Do the same with the dark creme de cacao. Pour the mixture into a large cocktail shaker. Add a small portion of ice to cool the drink down. Add 1 1/2 cups of full creme milk to the mixture. Shake in cocktail shaker. You may add more if desired. Filter out the ice whilst pouring into the glass. For decoration, squirt some chocolate syrup around the inside of the glass. Serve.