General Mills reported revenue of $4.094 billion in the first quarter of the 2019 financial year ending August 26, up from $3.769 billion in the three months ending August 2017.
As of 07:57 GMT, General Mills' share price tumbled 7.24% to $44.31 per share.
Net profits fell to $392.3 million, or $0.65 per share from $404.7 million, or $0.69 per share last year.