I agree with Glok.

And I don't think you're going to like my answer. On one hand your mother shouldn't be emotionally or verbally harsh with you. Ever.
On the other hand, you are too old to be asking your mom for money and it doesn't matter where she goes to eat. It's her money.

By the time I was 27, I had bought my mother a house and was very much taking care of her. She was an alcoholic and had a host of mental problems, including panic disorder. Someone had to take care of her, and that someone was me.

Your mom has done her part raising you. She owes you mutual respect but that's it. In the end, you will have to be responsible for yourself. There's really no gentle way of saying it.