A thick layer of tart, sweet lemon custard on a melt-in-your-mouth shortbread cookie crust. This Lemon Bar is as vibrant in flavor as it is in its color!
Add flour, sugar, salt, and cold butter to a food processor. Pulse until the ingredients become a fine crumble and stick together when pinched. The mixture will be crumbly.
Line an 8x8 baking pan with parchment paper. You do not need to grease the pan if you line it with paper. Pour the crust into the lined pan and press down firmly and evenly. Place in a preheated 400℉ oven and bake for 10 minutes. Remove and turn the oven down to 350℉.
Lemon Filling
Beat eggs and yolks together with sugar until fluffy and light yellow.
Add flour and baking powder to the whipped egg mixture, mix on high for another minute.
Continue to beat on high speed while drizzling in lemon juice.
Fold zest into filling with a spatula. Pour filling over hot crust. Place pan back into 350-degree oven for 25-30 minutes or until filling no longer giggles when pan is moved.
While the bars are hot, dust them heavily with powdered sugar. Allow them to cool, then lift them out of the pan by pulling them up on the parchment paper's edges and cutting them into 16 2-inch squares.
Notes
If you do not have parchment paper in your kitchen, you can grease the pan before baking with baking spray, vegetable shortening, or butter. Grease thoroughly before baking.