Blue Moon Mania: The popular flavor has Milwaukee roots Leon's Frozen Custard offered its first new flavor in 30 years Friday, bringing Blue Moon to the area Share Updated: 9:32 PM CDT May 21, 2021 Blue Moon Mania: The popular flavor has Milwaukee roots Leon's Frozen Custard offered its first new flavor in 30 years Friday, bringing Blue Moon to the area Share Updated: 9:32 PM CDT May 21, 2021 Hide Transcript Show Transcript A CUSTARD CRAZE AT LEON’S TONIGHT AFTER THE REVEALED ITS -- THE COMNYPA REVEALED ITS FIRST NEW FLAVOR IN 30 YEARS. COURTNEY SISK IS LIVE. COURTNEY, WHAT ARE YOU LEARNING ABOUT THE CLAIMS THE BLUE MOON FLAVOR ORIGINATED IN MILWAUKEE? COURTNEY: FIRST, IT IS NO SECRET PEOPLE IN THIS CITY LOVE THE FLAV.OR OK ALOT THIS LINE. IT HAS BEEN LIKE THIS LAL DAY, EVEN IN THE RAIN. BLUE MOON ICE CREAM ACTUALLY HAS MILWAUKEE ROOTS. PETRAN PRODUCTS WAS A FLAVOR COMPANY IN MILWAUKEE TTHA TRADEMARKED THE BLUE MOON FLORAV BACK IN THE 1940’S AND 1950’S. A MAN NAMED WILLIAM SIDON WORKED AS A RESEARCH CHEMIST. HE HAS SINCE PASSED ON, BUT A CHICAGO MAN TELLS 12 NEWS HE WORKED WITH SIDON AND IS NOW A PARTNER AT WEBER FLAVORS, THE COMPANY THAT BOUGHT PETRAN AND OWNS THE BLUE MOON TRADEMARK. HE SAYS SIDON WAS THE BRAIN BEHIND THE BLUE MOON MANIA. TONIGHT, WE TRACKED DOWN HIS DAUGHTER, WHO SAYS H FERATHER NEVER CLAIMED FAME FOR IT, BUT SHE BELIEVES HE’S NOT THE TYPE THAT WOULD HAVE BRAGD.GE WHATO D YOU THINK THAT WHEN YOU HEAR BLUE MOON? DO YOU THINK OF YOUR DAD, OR DO YOU WONDER? >> I WONDE TR,HE TIES SEEM TO LEAD TO HIM, BUT I DON’T KNOW, AND YEAH, WHEN I HEAR ABOUT BLUE MOON AND MY KIDS AND GRANDDSKI KNOW TOO, GRANDPA AND GRTEA GRANDPA, THEY THINK OF BLUE MOON. DERRICK: COURTNEY, THERE’S ALSO CONTROVERSY ABOUT THE BLUE MOON FLAVOR AND WHERE IT ORIGINAT.ED NI:CK THERE IS. SOME PEOPLE BELIEVE IT STARTED IN MICHIGAN. HOWEVER, IT’S THE MILWAUKEE COMPANY WITH THE TRADEMARK HERE . THE FLAVOR IS HERE TO STAY A