Chewy, coconut-forward bars studded with crunchy macadamia nuts and a rich, caramel-like topping. Adapted from Gourmet magazine, these bars are easy to slice and freeze, making them a great make-ahead dessert or snack.
Heat the oven to 350°F (175°C). Grease or line a 9 x 13-inch pan with nonstick foil, leaving an overhang for easy removal.
In a food processor, pulse the flour, cold butter pieces, and powdered sugar until the butter pieces are about the size of peas and the mixture looks like coarse crumbs.
Press the crumbly dough evenly into the bottom of the prepared pan and bake until the edges are set, about 20 minutes. Remove from the oven.
For the Topping:
In a saucepan, melt the 1/2 stick of butter over low heat, then remove the pan from the heat.
Stir in the packed brown sugar until it dissolves into the warm butter. Whisk in the cream of coconut, heavy cream, and lemon juice until smooth.
Fold in the sweetened flaked coconut and the macadamia nut pieces so the topping is evenly combined.
Assembly & Bake:
Pour the coconut-macadamia topping over the partially baked crust, spreading it to the edges.
Lower the oven temperature to 325°F (165°C) and return the pan to the oven. Bake until the topping is lightly golden and mostly set, about 40–50 minutes.
Let the bars cool completely in the pan on a wire rack before lifting out using the foil overhang. Cut into 24 bars. Store in the refrigerator or freeze for longer storage.