Following a tense discussion in the car, the pair failed to reach an agreement, with Kim slamming her older sister for trying to secretly persuade the caterers to follow her orders!
"She has this vision of no sugar or no disgusting chemicals in candy. It’s like a completely sugar-free, gluten-free, party-free, fun-free zone because Kourtney has decided that it just doesn’t make sense," the KKW Beauty founder admitted.
After the brutal disagreement played out and thousands of fans sided with Kim, Kourtney was hit with fierce backlash over her controversial comments... And she wasn't having a bar of what the haters had to say!
"Kourtney is the most annoying Kardashian, fr (for real) who acts that way about a child's birthday party? NO SWEETS at a party? Is it even a Candyland party without candy? Hmmm, she's just ugh. Hoping she quits the show," one savage viewer tweeted.
Standing by her remarks, Kourtney clapped back at the mum-shamer, writing: "Thanks for being so invested in this sugar plum. I didn’t say No sweets, we had organic cotton candy, and much more. There are healthier candy options. I appreciate your concern about my future as well, may God bless your sweet soul.
After another user said Kourtney's views were warped and she "needed help", she replied: "I never said NO candy. I said not all junk food, let’s have some salads etc, and @KimKardashian said she wanted the ice cream truck and I suggested organic ice cream with some non dairy options. Moderation."
This isn't the first time she's been called out by her fans.
Two months ago Kourtney faced a barrage of criticism over her controversial parenting methods when she said her eight-year-old daughter Penelope— who she shares with Scott Disick— had scratched their nanny's face.
While the ordeal shocked her sisters and mother, Kourtney's placid response to the situation angered fans with many arguing she doesn't know how to discipline her children effectively.
"Not trying to be the parent shamer or a judgy person but you need to get your kids in check now & take it serious now before they older because it only gets worse," one person Tweeted.
Kourtney later clapped back on Instagram, writing: "And in my opinion beating children is not the way to 'get your kids in check'. When children are hurting or frustrated, the answer is not to physically hurt them."
"But they can hit other people when they are angry and frustrated?" a fan questioned in response.
"They’re children and she was clearly hurting inside so hurting her physically is not going to make anything better," said Kourtney who later admitted to being "shocked" by some people's strong responses. "How do we not know better by now?!"
Another fan chimed in, writing: "Kids don't usually listen to words they listen to actions," to which Kourtney replied that "in no way is physical harm OK for us."