Fault line cakes are super trendy and impressive—and "Cake Boss" Buddy Valastro is showing you how to pull off the showstopper at home. 

The fault line on the outside of the cake is achieved by overlaying icing, Buddy says. "So if you're an icing lover, you're going to love the fault line cake, because it's got double and triple the icing on it." 

And if you're not much of a pastry chef, or you just want to see how the pros do it, you can actually have one of Buddy's cakes shipped from Carlo's Bakery nationwide through Goldbelly or Doordash. 

For one of Rach's favorite recipes from Buddy, check out his Sesame Cookies.