Pina Colada Bars

Step 1
Preheat oven to 350 degrees F (175 degrees C).

Step 2
Combine flour, butter, and white sugar in a bowl. Beat with an electric mixer on low speed, scraping bowl often, until crust mixture resembles coarse crumbs. Press into the bottom of an 8-inch square baking pan.

Step 3
Bake crust in the preheated oven until crust is set but still pale, 12 to 17 minutes.

Step 4
Combine brown sugar, eggs, 1/2 teaspoon rum extract, and salt in a bowl. Beat with an electric mixer on medium speed, scraping bowl often, until well-blended. Stir in pineapple, coconut, and macadamia nuts. Spread filling over hot crust.

Step 5
Bake in the preheated oven until filling is set and top is lightly browned, 25 to 30 minutes. Let cool completely, about 25 minutes.

Step 6
Whisk 5 teaspoons reserved pineapple juice, confectioners' sugar, and 1/2 teaspoon rum extract together in a small bowl to make glaze.

Step 7
Drizzle glaze over cooled filling; cut into bars.