Some stores and two locations in WA:
Capitol Hill 1316 E Pike St
Bonney Lake 21210 St Hwy 410E
Mr. Jalapeno's for dinner while my mom was visiting, we walked practically next door for dessert.
At least at the Bonney Lake location, the inside is done with an industrial/old school house feel with exposed duct work and menus made to look like chalkboards. It's a little intimidating if you've never been there before but the worker is happy to help with suggestions and offers a taste-test. They have two main flavors- chocolate and vanilla- with a special "flavor of the day" (check their taste calendar for listings). They serve their custard (which is "a smoother, creamier, and more flavorful than any super premium ice cream") in a variety of ways from Concretes (which is similar to a Blizzard), to plain scoops, milkshakes and more.
We ordered (shown left to right) a Concrete Andes Mint, a Concrete Heath with Sprinkles, one special of the day which this time was Chocolate Peanut Butter (he added Reeces), a Concrete with Kit-Kat, and One Scoop topped with Heath Bar.
When we ordered, I was helping my mom so didn't pay attention to my husband helping the 5 yr old so missed when they ordered something he wouldn't eat LOL. So the worker let us put the Kit-Kat Concrete in the freezer to stay frozen until we left and we ordered him a Single Scoop with Sprinkles and Gummy Worms (we planned on giving the extra to our oldest since she was at work). Everything was SO, SO, SO good!