I think that would be just fine. Just note, I have not tested with other nut butters so I cannot guarentee the texture will be the same as with peanut butter. Some options you can try are: tree nut butters, such as almond butter, cashew butter, or even pecan butter. There are also several nut-free butters that you can play around with: Sunflower Seed Butter, Tahini, Cookie Butter, or Soynut Butter. Just keep in mind that some of these options may have a stronger flavor than the peanut butter.