Fresh Fruit Purees Added to Cake Batter

RUBYMARTHA QUESTION: I would like to bake a cake with fresh purees. Such as peaches, strawberries, etc. I cannot seen to find a recipe with puree, I did find a couple using cake mixes but I want a scratch cake. I absolutely am an avid reader/owner of your books. I attended SCSCA in Pasadena in patisserie but have learned more from your books that I am sorry I made the expense for the school. If you can help me I would so appreciate it. Thank you,

ROSE REPLY: thank you--i'm very moved by your compliment. i must share another moving experience i had in pasadena when i was on tour for "the bread bible" 2-1/2 years ago. a woman named rose came to my book signing bringing her grown daughter as well. she reminded me that she had brought her daughter as a little girl to my signing for ""the cake bible. now she was returning to buy "the bread bible" for herself and another "cake bible" for her daughter to have now that she was living on her own. it was a very beautiful way for me to mark the passage of time! now for the fruit purees. i'm sorry to disappoint you but i found even when adding fruit juices to cake it seemed to disturb the ph balance of the batter and give it an off texture. cake mixes have emulsfiers and other things that give it what is known in the industry as "tolerance." this means that all manner of additions can be made and the cake will still work. as you've probably seen in "the cake bible," i do add purees to buttercreams with great results. perhaps another person on this blog has had a more positive experience adding it to cakes?