Khloe Kardashian Challenges Kylie Jenner to a Thanksgiving Cook-Off

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The sisters got into a silly Twitter feud after Kylie denied pregnancy rumors.

Kylie Jenner's tweet slamming pregnancy rumors randomly turned into a silly back-and-fourth with her sister, Khloe Kardashian, about souffles.

"They've been saying I'm pregnant for one year now," the 18-year-old reality star tweeted to her 12.5 million followers on Monday. "One year. Let's get it together lol."

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Seeing the tweet, her older sibling responded: "No one talks about you and this mysterious year."

Khloe's message then prompted Kylie to tweet about food. "You're just so f**king jealous that I won't give you my sweet potato souffle recipe," she bit back.

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Not backing down, and apparently plagued by autocorrect as we all are, Khloe -- who is hosting the family's Thanksgiving -- quipped: "You are going down on things giving! The cook-off is real my friend!!!!!"

Accepting the challenge, Kylie tweeted: "I'll see you in the kitchen lil girl."

These tweets leave us with two unanswered questions: Who will win the Kardashian-Jenner cook-off, and what makes Kylie's souffle so great?

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While the sisters are gearing up for a Thanksgiving food fight, Khloe otherwise seems to have Kylie's back. When the youngest Jenner sister started dating 26-year-old rapper, Tyga, Khloe defended her in an interview with Complex magazine.

"You're not gonna say, 'Hey, so what are you doing this weekend?' and have her say, 'Having a slumber party at my girlfriend's,' or 'Going to prom.' That's not what Kylie does," the 31-year-old Keeping Up With the Kardashians star said. "Kylie is taking business meetings and bought her first house, or she’s going on a private plane with Karl Lagerfeld to take a meeting. That's not even what people do in their 30s. It's a rare circumstance, so let’s treat this as a special case."