½ cup butter, softened
¼ cup plus ⅔ cup sugar, divided
1 cup plus ¼ cup flour, divided
½ teaspoon salt
¼ cup freshly squeezed lime juice
3 tablespoons guava puree
2 tablespoons powdered sugar
1 tablespoon lime zest
Preheat the oven to 350ºF.
In a medium bowl, stir together the butter, ¼ cup sugar, 1 cup flour, and salt until it forms a dough. Press into a 9x9-inch square baking pan. Bake in the oven until the crust is browned, about 20 minutes. Set aside to cool while you make the filling.
In a medium bowl, whisk together the eggs, lime juice, guava puree, remaining ⅔ cup sugar, and remaining ¼ cup flour until well mixed. Pour over the crust and bake until the filling no longer jiggles when moved, about 20 minutes more. Set aside to cool to room temperature. They will firm up as they cool.
Place the powdered sugar in a strainer or sifter and sprinkle over the cooled guava-lime bars. Top the powdered sugar with lime zest, cut the bars, and serve or store in the refrigerator.
Serves 9 bars.