On the behalf of the Potato Council, 2,039 people were interviewed and it was found that one-fifth of mothers said they rarely or never taught their children to cook.
Only half of mothers questioned described themselves as a good cook as against three-quarters of grandmother.
Sophie Grigson, the television chef and food writer, said that she was "saddened" by the results of the survey.
"Cooking has always been one of those things that mums taught their children - this was, and is, certainly the case in my family," The Telegraph quoted her, as saying.
"Everyone should know how to make simple dishes like a baked potato or Shepherd's pie -appetising and economical, but easy to make.I would encourage all parents to help their children learn to cook," she added. (ANI)