Suzanne — oh greek yogurt and orange marmalde sound like awesome substitute for any muffin recipe. (carrotsandspice.com)
The recipe suggests you use Daiya dairy - free cheese, which I did and it is an awesome substitute! (allysonkramer.com)
I will tell you it is definitely not as good and creamy as straight up peanut butter, but it makes an AWESOME substitute when you have a mega craving. (foodfaithfitness.com)