The notoriously fit 32-year-old pop star admitted that she felt like 'a mess' after giving birth to one-year-old Willow Sage last June.
She told Cosmopolitan magazine that although she occasionally eats chicken and fish, her new diet even turns vegan, meaning no animal products, at times.
An interview from the magazine's June issue delves into diet, revealing that she also cooked up a vegan feast for her husband Carey Hart in San Francisco to celebrate his 37th birthday recently.
The couple ate tortellini with fava beans, summer truffles, dinosaur kale and red pearl onions.
'I thought I'd feel like a goddess,' she said. 'They sell you on that s**t... like you'll never feel more feminine. Really, I just felt like a mess.'
She added, however, that she found some joy in the new shape her body took.
'I kind of enjoyed that too,' she said. 'Hell yeah, I gained 55lbs. I think my baby may be part cheesecake.'
The singer, whose real name is Alecia Moore, has kept a rather low-profile ever since the arrival of her daughter, no doubt enjoying motherhood.
But now she is ready to get back to work and is already back in the studio.
'I've been in mommy mode, and I'm just starting to get back out there into the real world,' she said. 'I've been in the studio recording my new album, so now it feels like everything is falling back into place.'
Her sixth album is titled The Truth About Love.
Slated for a September release, it will be her first since 2008's Funhouse.
The pop personality's latest single Blow Me (One Last Kiss) this week entered the coveted top ten list on the Billboard Hot 100, soaring from No. 58 to No. 9 in its second week on the charts.
Pink now has the third most top-ten singles, a total of 12, for a female.
She sits behind Rihanna, who has 22 and Beyonce, who has 14.