I am not going to let my niece have a cookie with gluten in it
Why wouldn't you allow her to have this cookie?
She is allergic to gluten.
That is expected not to give someone food knowing they are allergic to it. Can you make gluten free cookies for your niece?
I think so, I'll try to do that.
Well I'm glad that you know that she's allergic and saved her from getting sick.