Gavin & Kat try their hand at a 3 ingredient coffee mug cake recipe that they found on Pinterest. See how it went!

We may not have been well prepared and we may have incorrectly measured the peanut butter. Or perhaps we were just destined to fail at this Pinterest recipe. Either way, it was fun to do. Take a look as Kat & Gavin give this 3 ingredient mug cake a try.