Mix ingredients together very well. With your hands press dough evenly into an 8x8 dish lined with parchment paper.
Bake at 350 degrees for 20 minutes. It will brown but still jiggle a little in the middle.
Let cool for 5-10 minutes or until it no longer jiggles.
FILLING:
While the crust cools mix together the filling ingredients until it's nice and smooth.
Add lemon filling on top of the baked shortbread crust and put in a 350 degree oven for 40 minutes. Cool for 20 minutes and put in the fridge for a least 2 hours.
You can sprinkle confectioners sugar on top if you wish.