I have a lot of thing to do tonight and dont have time to run back to the store ! im all out of cake flour can i sub with all purpose flour

Yes you can.

For every cup of cake flour, remove 2 Tablespoons of AP flour.

For example, if the recipe calls for two cups of cake flour, you would get out two cups of All Purpose flour and then take out 4 Tablespoons of AP flour.

Hope this helps.

yes:

http://www.joyofbaking.com/flour.html

"Make your own - one cup sifted cake flour can be substituted with 3/4 cup (84 grams) sifted bleached all-purpose flour plus 2 tablespoons (15 grams) cornstarch."

thank you so much i have 3 cakes to make tonight along with a lot of other things

Duplicate post, please also see:

http://cakecentral.com/cake-decorating-ftopict-662827-.html

HTH