In a large bowl, use a fork or pastry blender to mix together the crust ingredients to form a crumbly dough.
Press into the bottom of a greased 8x8 baking dish.
Bake the crust at *350 degrees F for 15 minutes.
While that is baking, use a separate large bowl to mix the eggs, sugar, flour and lemon juice until well combined.
Add in the baking powder last and whisk together until no lumps remain.
Pour the lemon mixture over the pre-baked crust and place it back in the oven at *350 degrees for an additional 15 to 20 minutes or until the lemon layer is set.
Cool for several hours before cutting and serving.