Last year I bought Royal Icing from Behnfords (OK not cheap but it's only once a year) and this year I will probably get it from Tiimari which has a big selection of cake deco stuff now. The marzipan I found in Prisma or Citymarket and I think I got the candied peel and the dried fruit from the usual supermarkets and/or Hakaniemi and/or an organics shop. Those packs of Free Trade sultanas (kultarusina) are good (I think even Lidl sells them now), but currants (Korintti) are harder to find and they only seem to come in tiny tiny packs, so I sometimes bring those back from the UK (I use them in hot cross buns as well). I think that "weigh and pay" place near Kamppi (on Freda 55) is probably a good place to find mixed dried fruit.Mölkky-Fan wrote: icing sugar (how to make it from the stuff you get here) etc etc.
http://www.punnitse.fi/Makuja%20ja%20ar ... a%20marjat
http://www.dlc.fi/~marianna/gourmet/i_fruitd.htm