Place it at the end of a cooking reveal, after the plain mashed potatoes are shown, so it works as the punchline rather than the setup. Open with Oh My God for the first disbelief, then use this clip, and finish with Bruh if the meal gets an even flatter reaction from the table.
About this sound
This is a short spoken clip, lasting about two and a half seconds, in which a voice says the French phrase “Oh purée de pomme de terre,” meaning “oh, mashed potatoes.” It feels silly and gently bewildered, like a sudden reaction to something unexpectedly plain or absurd, and the plain food phrase makes the surprise easy to recognise and repeat.