AHi, I've been reading up on all the Peanut Butter Box cakes on site. My problem is that they call for 18.25 ounce boxes of cake mix. In Australia we work with grams now so I converted my 2 340 gram boxes and have 2 12 ounce boxes of yellow cake mix. This is annoying as I live a long way from the nearest town. Can any one help me by giving me a good recipe for a Peanut Butter "box cake". I really want to make Mum a lovely cake for her Mothers Day :-) ( this Sunday in Australia). She's mad about peanut butter :-) . Please help. Failing this I can make a scratch cake but thought the 2 boxes would be enough.

AP.S. I'm after a peanut butter box cake using 24 ounces of yellow box cake mix.