Taco Bell and Klondike have partnered again to offer the Klondike Choco Taco. The Choco Taco will be testing exclusively at 20 select Taco Bell locations for a limited time while supplies last. The Choco Taco is returning after a seven year absence. The Klondike Choco Taco mirrors the taco with a crunchy, thick-coated chocolate outside, and a creamy, fudge-swirled inside topped with peanuts.