Jiffy is a brand of baking mixes marketed by the Chelsea Milling Company in Chelsea, Michigan, that has been producing mixes since 1930. The company was previously named Chelsea Roller Mill. They are known for their products being packaged in a recognizable, small box with the brand's logo in blue. Jiffy was created as the first prepared baking mix in the United States by Mabel White Holmes.
Jiffy is an informal term for any unspecified short period, as in "I will be back in a jiffy". From this it has acquired a number of more precise applications for short, very short, extremely short, ultra short or hyper short periods of time. First attested in 1785, the word's origin is unclear, though one suggestion is that it was thieves' cant for lightning.