by: Daisha Jones Posted: Jul 8, 2026 / 09:20 AM EDT Updated: Jul 8, 2026 / 09:20 AM EDT National Mac and Cheese Day is on July 14th. PHL17 is celebrating early with one of Philadelphia’s favorite comfort food spots. Marti Lieberman, founder of Mac Mart in Center City, joined us to share the story behind her gourmet mac and cheese business, talk about what makes the classic dish a fan favorite, and showcase some of Mac Mart’s most popular cheesy creations.