I know this has probably been posted a lot but is there an online formula that can do this?

Um, you don't need a formula. Just multiply each ingredient by whatever number - 1.5, 2, etc. It helps me to print out the receipe & write the correct #'s in, otherwise I often find myself wondering if I've put the correct amount in lol.

It's easy. All you need is basic math. Just multiply it like idjitmom says.

I know the basic math...i was just hoping there was a plug in so I don't mess up and confuse!

I found this online I'm sure there are more out there but this should help!

http://www.fruitfromwashington.com/recipes/scale/recipeconversions.php

Sorry I don't mean to be rude or anything.

I wouldn't think there would be a cake specific plug in.. considering it is just multiplying numbers... and all by the same amount.

There is a calculator plug in on every computer though