Thank you to Jessi Lee!! Simple Peanut Butter Fudge 1/2 cup natural/plain peanut butter 1/2 cup butter Bring to boil for 2 minutes. Remove from heat. Add 1 tsp Vanilla and 1/3 (I may have used only 1/4 cup. I did not really measure..it was pretty sweet, so I could have cut back) cup powdered (I put in my ninja mixer) xylitol or sweetener of choice. Stir for about 4 minutes and pour into 8x8 pan. Refrigerate for at least an hour.