They resemble the normal Krabby Patties, except they are laced with explosives.
Role in episode
Mr. Krabs grows paranoid of Plankton's suspiciously protracted absence, so he comes armed with explosive-laced Krabby Patties.
It is later revealed that a surprise party for Plankton's first formula theft attempt was being thrown. Just as everyone is about to eat the Danger Patties, Mr. Krabs rushes over and prevents their near consumption, causing him to get painfully mauled by the patties' explosion.