I made this delish B-52 Cake by Leta and wondered why it was called that. If you want to layer for an alternate method instead of on the rock try, the secret to making the perfect layered drink is to pour your heaviest liqueur first, then add other liqueurs according to their density. This way the alcohol will not mix, but layer, one on top of the other. To figure the density of different liqueurs you may have to experiment a bit, but generally syrupy schnapps type liqueurs are the most dense, then cream liqueurs such as Irish Cream, and lastly regular liqueurs such as gin or vodka. To actually pour these drinks, the secret is to pour very slowly, barely dribble the liqueurs into your glass. Start with your first liqueur and pour it into your glass, now take your spoon and place the tip of the spoon very close to your first liqueur, now carefully and slowly pour in your second liqueur over the back of the spoon and into the glass, then your third. Repeat this step as many times as necessary to complete your drink. After a little practice you can generally do away with the spoon and will be able to pour a slow steady stream, and keep your liqueurs from mixing.