I am making this for Holiday Beverage tag so I opened it after 2 weeks to take a small taste. A omitted the glycerin but may go ahead and add it after the initial aging. The taste was of course not as strong as it should be having only aged a short time but it was still fairly strong and tasted enough like Grand Marnier that I think it will make a great sub. Oh and I used brandy.
Ok I got to the 2 month aging point. it`s strained and now wait for 3 more months. I must say it`s pretty good now! I just may add the glycerine. Thanks.