Just made a bunch of PA Dutch sand tarts.
3/4 c. butter
1 1/4 c. sugar
cream together butter & sugar till fluffy. Preheat oven to 400F.
add:
1 whole egg
1 egg yolk (save the white separately)
1 tsp. vanilla
1 tsp. grated lemon zest
beat well. Then add
3 c. flour
1/4 tsp. salt
beat together until it looks like crumbs. Mash into a ball.
Rub flour on a very clean kitchen countertop, and roll out the dough very thin, as thin as you can get it. 1/8" thin at least, or thinner. Cut w/ cookie cutters, then gently place on a greased cookie sheet with a spatula. Brush the tops of the cookies with egg white beaten with 1 tbsp. water, then sprinkle colored sugar on them. Bake about 7 minutes, until lightly brown around the edges. Immediately put the cookies on a rack to cool when done. Very fragile, do not ship well.