Mix it up. Here's the two-person mixing technique: Put the drink ingredients in the bowl. Go a little light on the booze and a little heavy on the mixer, as the extreme cold will make the drink less sweet than it would otherwise be. (Don't worry, you'll adjust the ratios later). Then LN2 pourer ... pours LN2 into the bowl while the stirrer ... stirs the mix. You won't be able to see what is happening, so the pourer pours slowly and stops every so often to allow the stirrer to see into the bowl.