A margarita machine is a margarita dispensing device invented by Mariano Martinez in 1971. It was 1971 and Mariano Martinez had just opened his first restaurant in Dallas, Texas. It was an instant sensation. However, on opening night guests were complaining about the consistency of the blended margaritas that Mariano developed using his father's secret recipe. They complained that some were nice and cold, some were melted down and some were not cold at all. Mariano immediately addressed these complaints with his bartenders. They threatened to quit, telling Mariano that the margaritas were too hard to make, especially consistently.