“Ummm …@iveychildersand@iveycakestorehave outdone themselves once again!” Underwood wrote on Instagram Sunday, alongsidea series of photosshowing off the elaborate, colorful creation.
The sweet treat consisted of a giant replica of Kermit the Frog resting atop a cake shaped like the number 4, which was also covered in polka dots and various beloved characters from the Muppets franchise like Miss Piggy, Rowlf, Animal, Gonzo, Beaker and the Swedish Chef.
Along the base of the cake, a message proclaimed, “Happy birthday Isaiah,” along with a “MOST WANTED” stamp — a reference to the birthday boy’s favorite movie at the moment,Muppets Most Wanted.
Carrie Underwood/Instagram; Inset: Getty
Isaiah Fisher’s birthday cake.Carrie Underwood/Instagram
“Isaiah loves the Muppets and his favorite movie right now isMuppets Most Wanted,” explained the “Cry Pretty” singer, 35. “He wanted a ‘most dangerous frog’ cake and he most certainly got one!”
Praising the pastry further, she wrote, “And it tasted as delicious as it looked! Thanks for making his birthday celebration extra special!” before adding the hashtags “#MyBestieIsABaker #IveyCake #Yum.”
So far, this is the only photo Underwood has shared from her son’s birthday celebration — his first since becoming a big brother on Jan. 21.
Mike Fisher with sons Isaiah and Jacob.Carrie Underwood/Instagram
Carrie Underwood/Instagram
Before herCry Prettytour kicks off in May, the American Idol alum is spending time with her family of four at home in Tennessee, enjoying every moment.
“They’re total homebodies,” asource previously told PEOPLE. “They rarely leave their home at night and love the outdoors and often go for walks.”
“Carrie lives a very quiet life. They take Isaiah fishing, to the zoo and tofarms so he can learn about animals,” added the insider. “They very much live a farm life and seem to love it.”
The proud mama shared thefirst photos of her newbornlast month as she simultaneously shared the good news that she had officially become a mother for the second time.
“Jacob Bryan Fisher entered the world in the wee hours of the morning on Monday … his mom, dad and big brother couldn’t be happier for God to trust them with taking care of this little miracle!” Underwood wrotealongside a photo gallery of herself, Fisher and proud big brother Isaiah holding onto Jacob.
“Our hearts are full, our eyes are tired and our lives are forever changed. Life is good … ” she added.
Mike Fisher and son Jacob.Mike Fisher/Instagram
Mike Fisher and son Jacob.Carrie Underwood/Instagram
Shortly after Underwood shared Jacob’s birth announcement, Fisher shared a celebratory post of his own, which touched ontheir tough pregnancy journey.
source: people.com