The food-at-home index, which represents food purchased in places like grocery stores for consumption at home, jumped by an annual 13.1 percent, which is the fastest pace since March 1979.

Some of the sharpest year-over-year jumps in food purchased for consumption at home include flour (+22.7 percent), chicken (+17.6 percent), milk (+15.6 percent), bread (+13.7 percent), and eggs (+38 percent).