Barnacle Chips are nearly like normal chips in Bikini Bottom. You can see a large sign in of the Barnacle Chips in the Episode: Chocolate With Nuts. SpongeBob SquarePants says that these chips are good in selling, but they don't taste very well.
SpongeBob: I can’t understand what we’re doing wrong.
Patrick: I can’t understand anything.
SpongeBob: There must be something to this selling game that we’re just not getting. Other people do it, I mean look at that! (points to a giant billboard)
Patrick: (reads the sign) 'Eat Barnacle Chips: They’re Delicious'
SpongeBob: They are most certainly not delicious.
Patrick: Not the way I use them!
SpongeBob: Yet they sell millions of bags a day.