The twosome worked together on Bey and Jay-Z's "On the Run" promo, "Run," and Blake decided to spoil the singer with one very sweet treat.
Check out the "Gossip Girl" star's amazing baking skills above!
"In honor of the Queen of all Bs...I had to make this Meyer Lemon Honey cake. Happy Birthday Beyoncé!!! Xxo Blake @beyonce @blakelively @preserve_us," the 27-year-old captioned the video.
It seems like the "Drunk In Love" singer definitely made a lasting impression on the blonde beauty. After working on the promo with the superstar couple, the fashionista gushed about the experience during a Twitter Q&A for Vogue.
"It was the first moment in my life where I truly felt cool," she said of the video shoot. "It gave me a high sense of self-esteem for a good 10 min."
Well, we're sure the "XO" singer loved Blake's birthday gift! What do you think about Lively's cake? Tell toofab in the comment section below and click "Launch Gallery" below to see more of Beyonce's best candids!