Gluten-Free Lemon Bars. Ingredients: Crust: 1 c gluten-free flour; ½ c melted butter; 3 tbsp maple syrup; pinch of salt. Filling; 3 large eggs; ¾ c maple syrup; ⅓ c lemon juice; 1 tbsp lemon zest; 2 tbsp gluten-free flour. Preheat oven to 350°F. Line an 8-inch square pan with parchment paper. Mix crust ingredients, press into pan, and bake 15–18 minutes. Whisk filling ingredients until smooth. Pour filling over the hot crust and bake 20–22 minutes, until just set. Refrigerate for 1 hour before slicing. Enjoy!