When Costco discontinued its combo pizza, fans were so devastated that they launched a Change.org petition alongside an impassioned Costco pizza manifesto. The combo pizza, they wrote, "ignites a party of tremendous flavor in the mouths of millions of Costco membership holders." This is all to say that Costco superfans are also pizza heads. Some of those fans recently shared what they think Costco's best frozen pizzas are. (Not already a Costco member? You can apply here.)
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