Preheat the oven to 225ºF. Line a 9×9-inch baking dish with parchment paper.

Place the dates and dried mango in a food processor and pulse until “gooey.” Transfer to a large mixing bowl. Add the remaining ingredients in the order listed and mix thoroughly. Transfer the mixture to the lined baking dish and press down thoroughly and evenly. Using a pizza cutter, cut the unbaked mixture into 12 bars. Bake for 45-60 minutes until the middle is firm. Let cool completely, then cut into 12 bars on the pre-cut lines. Wrap each bar individually in plastic wrap.