The 42-year-old TV star and her partner Erik Asla welcomed son York via a surrogate in January and Banks says she does not want their son to grow up eating food from restaurant, reported Female First.
She shared a picture of herself at the course on Instagram.
"I have never been one to be very excited about cooking. I put all of my energy into my work and to succeeding, so instead of cooking, I eat at restaurants all the time, order in, or defrost frozen food in my microwave," she wrote.
"I want to be his chef. I want him to go to college and miss his MOMMY'S masterpieces. I want all of his friends to be fighting to come to his house to sample his mother's culinary creations. So, I did something about it. I enrolled in ad intensive Boot Camp at @theculinaryinstituteofamerica in St. Helena and I have to say, it changed my life (sic).