To the extent that this board is a collection of culinary treasures of the Great Northwest, it ought to include a few words about Winegar's Ice Cream in Ellensburg, WA.
One of these days if you happen to be on your way to Spokane, the Tri-Cities, or perhaps to Prosser for a bit of wine tasting, this place is a real treat, and definitely worth the detour (which isn't such a great detour after all).
Location is 608 North Main Street in Ellensburg. Phone is 509 933 1821.
It has been a couple of years since I encountered this place (hence no blow-by-blow description of their list, which has probably changed anyway), but you can tell something by the fact that I'm still motivated to share it. It's just one of those finds, particularly on an hot, arid afternoon, that sticks in my mind!