I made a cake last month for someone who insisted on either a strawberry or raspberry flavored cake. She wanted the frosting to be vanilla.
So I made at least 4 test cakes using various recipes from the Cake Bible, replacing some of the liquid with pureed fruit. All of them came out dense, like a fruit flavored brownie, with the exception of one in which I used raspberry Jello. I think I used about 1/4 cup raspberry puree and replaced some of the sugar with the Jello. But I still wasn’t happy with it because it just didn’t taste good to me.
After reading Rose’s post on this topic (http://www.realbakingwithrose.com/2006/01/fresh_fruit_purees_added_to_ca.html) I eventually gave up and figured the only way to get a light and airy fruit flavored cake was to go with a doctored mix.
I got permission from my friend to use a mix, but it hurt me to make it.
Go ahead and try it…maybe your recipe will hold up better. At the very least you’ll end up with a good strawberry brownie.