01 - Preheat oven to 350°F. Line an 8-inch square baking pan with parchment paper, leaving overhang for easy removal.
02 - In a large bowl, whisk together flour, shredded coconut, granulated sugar, ground cinnamon, and salt.
03 - In a separate bowl, whisk melted butter, eggs, lemon juice, lemon zest, and vanilla extract until smooth.
04 - Pour wet ingredients into dry and stir gently until just combined.
05 - Evenly spread the batter into the prepared baking pan.
06 - Bake for 22 to 25 minutes until edges turn golden and a toothpick inserted in the center comes out clean.
07 - Allow bars to cool fully in the pan.
08 - Sift powdered sugar and cinnamon together, then dust over the cooled bars.
09 - Lift bars from pan using parchment overhang, slice into 12 portions, and serve.