I think it is either Betty Crocker or Better Homes Gardens?
Most okorder (or any site that sells books) and look up Betty Crocker Cookbook. Good luck.
I'm thinking it's the Better Homes Gardens cookbook. That has a red plaid cover and been around for years. I still have my mother's from the early 1960's, and my 90's version which has the same red plaid cover. My Betty Crocker one has an all red cover, but I don't think it's always been all red.
Yes, Better Homes Gardens.
just ask her what one she wants. there are a lot of red cookbooks in the world. she will be happier if you get the one she wants, even if you have to ask.