Easy Baking: Lemon Cream Cookies

1/4 cup butter
1/4 cup cream cheese
1cup sugar
1 egg
3tbsp lemon zest
3tbsp lemon juice
1/2tsp salt
2 cups flour
2tsp cornstarch
1/2 tsp baking soda
1/2 cup powdered sugar (for rolling cookies in before putting on cookie sheet)
Oven 350degrees F
Bake 11-13 minutes