sift together flour, salt, and baking powder. Set aside

cream together butter, sugar, and vanilla. Then add egg and egg yolk and mix well.

add flour mixture to butter mixture, mix together.

line a 9 x 13 inch baking dish with parchment paper. press dough into pan.

chill dough in refrigerator for 30 minutes.

bake at 350°F for 25-30 minutes, until the edges begin to golden slightly.

cool, cut, eat, enjoy!