I've made this a few times using 1/2 cup each of dried cranberries, white chocolate chips and pecans and it's the best. My mom was telling me about some peanut butter biscotti she had once and that got me thinking about making the recipe but substituting half the butter with peanut butter (so, 3 tablespoons of each) and then mixing in peanuts and dark chocolate chips. Would substituting peanut butter for butter be one to one?

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