The company said the extra fee will vary by region and location, and it declined to specify which restaurants will be affected.

The Department of Agriculture warned egg prices may increase more than 20% this year, after December saw a year-over-year increase of 36.8%.

Denny's is temporarily adding an egg surcharge at some of its restaurants because of the nationwide egg shortage and increased prices, the chain confirmed to Axios Monday. Why it matters: The bird flu has ravaged the nation's supply of eggs,