In 1949, Jim and Margaret Knudson visited a friend's home for dinner. They were served
tacos for the first time, and having experience in the food business, Jim thought the
taco would have universal appeal, and so he developed his own taco recipe. He added his recipe to the menu of his restaurant "Jimmy's 49er Cafe" located in
Grass Valley, California. In the first few years, customers were not enthusiastic about trying the menu item, but it gradually gained popularity. In 1954, the two converted a 16-foot trailer into a
mobile kitchen. ==References==