This is the classic layered shot. The folks over at A Year of Cocktails have the recipe for the mix of Kahlua, Bailey’s, and Gran Marnier, which totally easy to make. Just ask any bartender at a classic Irish pub, he’ll surely know what to do
Here is the recipe for a B52 shooter:
1/2 oz Kahlua
1/2 oz Baileys
1/2 oz Grand Marnier
In a shot glass pour in your Kahlua. Next, on the back of a bar spoon that is slanted towards the inside (end of spoon literally touching the inside of the glass) of the glass slowly pour your Baileys. Using the same process as the Baileys, slowly pour your Grand Marnier.