Speaking to her legion of 129 million followers via Instagram live, the youngest KarJenner admitted she cut processed carbs like pasta from her diet and started to see results almost immediately.
"I really eat very crazy, usually - like, whatever I want," the 21-year-old revealed.
"Pizza, pasta and a lot of dairy, and I just kind of cut all of that out. I've just been eating better and I feel like that's the trick for me, personally."
The Keeping Up With The Kardashians star conceded she is naturally slim and has "always had a really flat stomach", but said she felt her shape never "went back to what it was before Stormi" until she switched up her meal plan.
Kylie offered words of encouragement to other mums, reminding: "It really does take [a while] to get your body back - it created a child!"
The "self-made" beauty guru certainly looks content in her own skin in recent months, sharing a slew of seductive snaps and short video clips on social media to showcase her enviable physique.
WATCH: Kylie Jenner Proudly Flaunts TINY Post-Baby Waist
The Instagram address comes two weeks after Jenner accused her baby daddy of cheating on her.
Kylie reportedly discovered "evidence" of Scott's infidelity on his phone leading to an explosive argument.
The rapper allegedly cancelled a concert in Buffalo, New York to deal with the fall out although these claims were refuted by his rep.