April 01, 2015 02:15 PM

Jim Spellman/WireImage

Hilary Duff has already found a sous chef in her 3-year-old.

The busy mom chatted Tuesday at the New York City premiere of her new series Younger about the delicious mother-son activity she’s discovered with her son Luca Cruz — cooking!

“Lately I’ve been trying to get him into cooking because I love to cook,” Duff, 27, tells PEOPLE.

But the Disney Channel alum isn’t leaving her toddler alone to man the kitchen. She mostly lets Luca mess around with the pots and pans while she takes on the hard labor.

“I try to cook things that involve lots of different bowls where he can be dipping stuff in,” the singer and actress explains. “It’s nice for him to touch the food and work with it and then eat it.”

And the hobby can be a nice break when Duff needs to stop and breathe.

“That has been my new favorite activity because it’s somewhat mellow and he’s actually getting into it,” she says of their culinary pastime. “He’s so into trains and cars and hide-and-go-seek and tag and chasing and racing — I never sit down!”

The pace of motherhood has picked up since Duff separated from husband Mike Comrie, 34, last year. But the actress still manages to mix work and play with the help of her ex, who would bring Luca to set while Duff was filming.

“She’s a mother that is always thinking about her child even when she’s not with her child,” Duff’s costar Debi Mazar, 50, tells PEOPLE.

“She was always filming him, bringing him to set, introducing him to people. She’s very hands-on,” Mazar says. (She also says she never once met a nanny!)

The first-time mom has a full plate with a busy career and family, but she “wouldn’t change too much,” she says, which is a key theme in her new show.

“[The message] we are really striving for is to not have too many regrets. To take whatever comes your way, bumps in the road, move past them, figure out how to reinvent yourself, persevere forward,” Duff says.

Younger airs Tuesdays at 10 p.m. on TV Land.

— Jacqueline Andriakos with reporting by Maggie Parker

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