1 cup all purpose flour
1/4 cup sugar
1/4 teaspoon salt
3/4 cup sweetened flaked coconut, toasted, cooled
6 tablespoons (3/4 stick) chilled unsalted butter, cut into 1/2-inch cubes
3/4 cup sugar
2 large eggs
1/4 cup fresh lemon juice
1 tablespoon (packed) finely grated lemon peel
1 teaspoon all purpose flour
1/2 teaspoon baking powder
Pinch of salt
1/4 cup powdered sugar
For crust: Preheat oven to 350°F. Line 8x8x2-inch metal baking pan with foil, leaving overhang. Butter foil. Combine flour, sugar, and salt in processor; blend 5 seconds. Add coconut and butter; process until mixture resembles fine meal and begins to clump together. Gather dough into ball. Press dough evenly over bottom of prepared pan. Bake crust until golden at edges, about 25 minutes.
Meanwhile, prepare filling: Combine 3/4 cup sugar, eggs, lemon juice, lemon peel, flour, baking powder, and salt in processor. Blend filling until smooth.
Remove crust from oven. Pour filling evenly over hot crust. Return to oven and bake until filling begins to brown at edges and is just set and springy to touch in center, about 30 minutes. Transfer pan to rack; cool lemon bars completely.