Kahlua is a Mexican liqueur that is flavored with coffee. Kahlua has a thick texture and a sweet flavor. Besides coffee, Kahlua also is made of sugar, corn syrup and vanilla bean. The price of Kahlua depends on the size of the bottle and where it is purchased. In the United States, a 750ml bottle can be purchased for around $24. A 375ml bottle can be purchased for roughly $14. A one litre bottle costs around $31.