"This is not a #TBT! This is Saturday's episode of #TrishasKitchen!" Yearwood wrote alongside a photo of herself appearing as Brooks standing next to her friend, hairstylist Glenda Martin, who donned a curly blonde wig and brown blazer to appear as Yearwood.
"Do I make a good Garth?" Yearwood continued.
Yearwood's costume included the country star wearing a black and white shirt, blue jeans, fake facial hair, a headset mic and a black cowboy hat.
This is not a #TBT! This is Saturday's episode of #TrishasKitchen! Do I make a good Garth? Sneak peek on my Facebook page and link in bio xo . . . . . . . . . . #TrishasKitchen #TSK #FoodNetwork #GarthBrooks #Halloween #Costume #HalloweenCostume #Food #HalloweenCandy #Recipe #SouthernKitchen #throwbackthursday #throwbackthursdaysAdvertisement
Yearwood also shared on Facebook footage of herself on Trisha's Southern Kitchen wearing the disguise while speaking with Martin.
"That's really good hair," Yearwood commented on Martin's wig in the video before stating how hard it was to laugh while wearing the fake facial hair.
Yearwood will be seen wearing the Brooks costume on Saturday at 10:30 a.m. ET on the Food Network.