Algona, Iowa (CNN) - Six days after challenging Mitt Romney to "test this kitchen," Newt Gingrich goaded his GOP opponent to "come to the chocolate factory"–a loaded dare referencing Romney's quip that a recent Gingrich campaign stumble was less like Pearl Harbor and more like "Lucille Ball at the chocolate factory."
During a campaign stop at The Chocolate Season in Algona Wednesday, the former House speaker told supporters Romney was trying have his cake and eat it too.
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"Governor Romney had a cute line yesterday about my team representing Lucy and the chocolate factory and I just want to say here I am in the chocolate factory," Gingrich said.
Romney previously answered Gingrich's call for him to publicly denounce negative campaigning by the super PAC that supports his candidacy by suggesting his rival couldn't stand the "heat of this little kitchen."
Gingrich retorted with a test for Romney: meet him for a one-on-one 90 minute debate. He repeated that tease Wednesday.
"Now that I have the courage to come to the chocolate factory I hope Governor Romney will have the courage to debate me one-on-one and defend his negative ads and give us a chance just the two of us, 90 minutes, no timekeeper, no moderator," Gingrich said.
"Let's chat like adults about this campaign. I don't expect him to do it but I hope if he comes by he'll at least buy some chocolates."
–CNN Political Producer Shawna Shepherd contributed to this report.