Preheat your oven. Set it to 350°F (175°C). Yes, actually preheat it. This is not optional. Cold ovens ruin dreams.
Make the crust. Mix flour, sugar, salt, and cold butter until crumbly. Press it firmly into a lined baking pan. Think “packed sandcastle,” not “loose beach sand.”
Bake the crust. Bake for about 18–20 minutes until lightly golden. It should look set, not sad.
Whisk the lemon filling. While the crust bakes, whisk eggs, sugar, lemon juice, zest, and flour until smooth. No lumps allowed—this isn’t oatmeal.
Pour and bake again. Pour the filling over the hot crust and return to the oven for 20–25 minutes. The center should jiggle slightly, not wave hello.
Cool completely. This part tests patience. Let it cool fully so the bars set properly. Warm lemon bars = lemon soup.
Slice and dust. Cut into squares and dust with powdered sugar if you’re feeling extra. Or not. You do you.