Due to a change in formulation Kahlua is no longer kosher wherever it is produced or bottled. Old stocks of Kahlua which were produced and bottled in Mexico and which were purchased before 1st April 2016 may be used.

Is Kahlúa vegan?

No, original Kahlúa and Kahlúa products are all explicitly labelled as not vegan. The 'Ready-To-Drink' products are labelled as containing milk or milk proteins, but it's a little less clear why the original drink isn't vegan friendly.

Is Grand Marnier kosher?

Without proper supervision, this would be prohibited to the kosher consumer. Among the citrus liqueurs is Cointreau, which is a Triple-Sec Curacao. This and Grand Marnier, from the Bordeaux wine region, have a champagne Cognac base, and are not kosher.