1/3 a fluid ounce or 1 centilitre of Bailey's Irish Cream
1/3 a fluid ounce or 1 centilitre of Tia Maria
1/4 a fluid ounce or 7.5 milliliters of Absinthe

First pour the Bailey's, then the Tia Maria, and then the Absinthe (carefully!). Put the shot on fire and drink it with a straw. Or, when the shot is on fire blow on it to extinguish and then down it in one. ALWAYS USE CAUTION WITH FIRE.