[fr_freak]

Go to the ‘weed store’. Buy her some brownies. Have her start with ‘tiny’ pieces, slowly.

I would not advise this unless you are extremely careful. Consuming THC cooked in food can hit you at 10x the rate of consuming the same amount of THC through smoking (or vaping) and it lasts a lot longer. The trickiest part is that you cannot predict when it will kick in. It could kick in 15 minutes after consumption, or 2 hours after consumption - it all depends on the condition and current workload of your digestive system.

To put it "bluntly" for someone who has never used weed before, eating it has the greatest risk for a bad experience, and edibles tend to be made by serious stoners for maximum potency. If smoking or vaping simply isn't an option, then try it, very small piece by very small piece at least a half hour apart each in order to avoid the situation where the first piece is only now hitting you while you've already consumed 2 or 3 more.

[glasseye]

“If smoking or vaping simply isn’t an option, then try it, very small piece by very small piece at least a half hour apart each in order to avoid the situation where the first piece is only now hitting you while you’ve already consumed 2 or 3 more.”

Would not recommend consuming for effect by adding doses one after another.
Try a ‘dime’ sized chunk of commercial brownie and access any benefit the following day. Then try an increase the following day if needed, rinse, repeat.
The goal is to see at what quantity of brownie being more hungry is achieved, not “did you catch a good buzz grandma?”.