Preheat oven to 350
1 cup cold butter (lightly salted), cut into pieces
2 cups all-purpose flour
1/2 cup powdered sugar
zest of 2 lemons
Put all ingredients in food processor. Pulse just until dough comes together. Press dough into ungreased 9x13 glass baking dish. Bake at 350 for 20 minutes.
2 cups sugar
1/2 cup flour
1/3 - 1/2 cup fresh squeezed lemon juice, to taste
1 tsp baking powder
1/8 tsp salt
Put all ingredients into food processor bowl and blend until combined. When crust has baked 20 minutes, remove from oven and pour filling over crust. Return to oven and bake for another 20-25 minutes until filling is set and light golden brown on top.
Cool completely. Sprinkle with powdered sugar and cut into desired number of bars.