And while the momma of three seemed surprised by the yummy-looking concoction, her KUWTK sister was audibly piiiiissed!
Considering the 32-year-old has been all about healthy eating during the holidays on her app, we can kind of understand why. LOLz!
In the clip, Koko goes on about how the couple outdid her gingerbread house present to them AND wonders what's wrong with them. She's "trying to be skinny," people!
Of course, we're sure the reality TV star was just kidding — but let's hope she doesn't throw it out!
We'll take it if she won't. Ha!
Get a good look at what mashed potato heaven looks like (below):