The cake was a "smash!"

Smiling Meghan Markle Holding Baby Archie with Prince Harry
Credit: Toby Melville - Pool/Getty Images

Archie Harrison Mountbatten-Windsor had a first birthday to remember — and a homemade cake courtesy of his foodie mom!

To celebrate Archie's big milestone on May 6, Meghan baked a smash cake at the family's L.A. home, while Prince Harry took point on the festive decor.

"Meghan made the cake — strawberries and cream," a source tells PEOPLE. "And Harry helped with decorations and blew up balloons."

The small celebration also included video chats with loved ones. "They Zoomed with godparents, friends and family and had a really simple but incredibly joyous day," says the source.

Also among the celebrants: the family's two dogs, Guy the beagle and a black Lab the couple adopted in 2018.

Archie "is best friends with his dogs," says the source. "They make him laugh and are gentle with him."

In celebration of Archie's special day, Meghan and Harry shared a video in which Meghan reads the children's book Duck! Rabbit! while an eager Archie sits in her lap. The video supported the @SaveWithStories campaign in the U.S. — and @SaveChildrenUK in the U.K. — which helps kids who have been adversely impacted by the COVID-19 pandemic. In the U.S., #SAVEWITHSTORIES was created by Jennifer Garner and Amy Adams in March.

Four days after the birthday festivities, Meghan celebrated her second Mother's Day — this time, joined (at a safe social distance!) by her mom Doria Ragland, who also lives in L.A.

The last time fans caught a glimpse of Archie was on New Year's Eve when his parents shared a photo of Archie in Harry’s arms while standing in front of a scenic view. Archie also took center stage in the Duke of Duchess of Sussex’s first Christmas card as a family of three.

The Sussexes spent several months on Vancouver Island in Canada before they moved to Los Angeles in March after announcing their departure from royal life.