For these types of Irish whiskies they can be made from one of many grains featuring rye, barley, wheat and corn. Often they might choose more than one to gain different flavours and the still they use to create the spirit doesn't have to be any in particular. Although they mostly use what is called a Continues Column Still. There aren't many of the whiskies produced so heres a few top grains from Ireland.
Glendalough is one of the newer Irish distilleries, based in Co. Wicklow. Their Double Barrel Irish Whisky is a single grain, which has been matured in bourbon barrels before being finished for six months Oloroso Sherry casks. It’s bottled at 42% ABV.
Named the Worlds Best Grain Whisky in the 2014 World Whisky Awards, Teeling Single Grain is an Irish single grain whiskey made of pure quality. The Teeling Whisky company uniquely matured the whiskey in Californian Cabernet Sauvignon casks. This has given this beauty a massive flavour profile of sweetness and honeyed fruits.