The First-Ever Frozen Margarita Was Made In An Unexpected Way - Tasting Table
Briefly

"In 1937, the debut of the Waring Blender at a trade show revolutionized the cocktail scene, allowing for the creation of blended frozen drinks, particularly the margarita."
"Mariano Martinez's innovative use of a secondhand soft-serve ice cream machine transformed how frozen margaritas were served, enabling faster production and consistent quality."
Read at Tasting Table
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