My mom's love in life is eating and cooking, but she doesn't like to treat herself to good quality products. If you have a mom like this the key here is to NEVER tell them how much it cost.
Love the idea of signing my mom up for something new that she would never consider doing for herself. Some of these I would recommend that you also do the work and set up Plex or that eHarmony account versus just paying for it and letting her set it ...
My mom doesn't enjoy luxury items, but that doesn't mean that she doesn't take care of herself or like pretty things. She also will enjoy anything that is just practical for her everyday life.