Step 1

Line a 13-by-9-inch baking dish with parchment paper. Cook peanut butter, butter, honey, and salt in a large pot over medium, whisking occasionally, until butter melts and mixture is smooth, 5 to 6 minutes.

Step 2

Remove from heat and fold in oats. Fold in peanuts and cherries, if using. Press mixture evenly into prepared dish. Chill until firm, about 3 hours. Remove from dish and cut into 32 bars. Refrigerate in an airtight container for up to 1 week.