For the crust mix the butter, sugar, and vanilla together in a medium bowl.
Add the flour and stir to combine.
Press firmly into your prepared pan and bake for 15-20 minutes or until the edges are light brown.
Add the sugar and flour into a large bowl. Use a whisk to get out any lumps.
Add the eggs, lemon juice, and lemon zest and whisk until combined.
Pour the filling over the warm crust. Bake for 30-35 minutes until the center is set and doesn’t jiggle.
Remove from oven and cool completely at room temperature. Then refrigerate.
Dust with powdered sugar before serving.
Notes
TIPS!
Use a glass pan. Ceramic is fine, but glass is best. I sometimes detect a slight metallic flavor in the lemon bars when baked in metal pans.
Use fresh juice. Store-bought bottles are convenient, but you miss out on a lot of flavor. You will definitely taste the difference!
To Slice: Once completely chilled, take a very sharp knife, and rub a little oil on it. Slice, wipe the knife clean and repeat. This will give you those beautiful clean cuts!