It may be possible to salvage overly soft peanut butter fudge. Scoop the fudge back into a saucepan. Add 2 cups of water or 1-cup each of water and evaporated milk. Stir the mixture until everything is dissolved and turn the heat on. Cook the syrup again until it reaches 235 °F. Stirring in 1/2-cup of confectioners' sugar during the second round of boiling is another option for fixing soft texture. Taste the syrup during the second round of boiling, and add more ingredients if the taste is diluted.
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