What will happen if I do this? I am making cookies. Thanks.

They might spread out more.

sorry, DiscoLady I thought I was right :0( Obviously I don't make a lot of cookies....lol

From my experience with sugar cookies, they will also be hard and crisp not flaky. If you have to do this - I would go 1/2 and /12 not the whole thing then see if you like it. Or just get another recipe that calls for all butter......

Oh look it, I made regular member!

I always make my cookies with butter, never shortening. This gives them a much better flavor and I have never had a problem. If you are worried about them spreading out, put the cut cookies in the freezer for about 5-10 minutes before baking. I do not know how shortening makes the cookies turn out, but with butter, they are buttery and crispy, not real soft.

These cookies usually come out crispy with the shortening. I'll let you know how they come out with the butter. They're in the oven right now.
Thanks for all the advice.

Congrats on being regular or should I say "a" regular. Sounding funny. !

I detected no difference whatsoever in the taste or consistency of the cookies. Still yummy