Credit: Alo Ceballos/FilmMagic

They grow up so fast!

It's only been 15 months since reality star and natural foods chef Bethenny Frankel, 40, gave birth to Bryn, her first daughter with husband of one year Jason Hoppy.

And yet, when the mother-daughter duo stepped out in New York City Tuesday, Frankel's bundle of joy looked remarkably grown up. Sporting a full head of blonde hair with a butterfly clip, the smiling tot waved to photographers while being cradled by her mother.

Earlier this month, Frankel defended her decision to raise her daughter as a vegetarian. "If Bryn is older and wants something at a party that isn't vegetarian, I don't want her to feel ostracized. She'll find her way," she wrote on her website.

Bryn still consumes some animal products, though. "I chose not to have her be vegan because I believe she needs the fat and protein in milk," Frankel explained. "Sometimes I need her to fill up on organic cheese. Her health comes first."

"Our babies are a beautiful clean slate," Frankel said. "I am so excited for how healthy [Bryn] will be."