Mix your flour, sugar, and cold butter together. Use a pastry cutter to make fine crumbs. Press this mix into the bottom of pan.

Bake the crust for about twenty minutes now. It should look slightly golden and firm. Remove it from the oven to cool slightly.

Whisk the eggs and sugar in a bowl. Add the lemon juice and zest slowly. Mix until the filling is very smooth now.

Pour the lemon mix over the hot crust. Be careful not to spill any liquid. Return the pan to the hot oven immediately.

Bake for another twenty to twenty-five minutes. The center should be set and not jiggly. Let the bars cool down completely at room temperature.