Key Lime Sugar Cookies

Good news!  My relationship with food (and thinking about it) is getting to be more cordial, and so I would like to share a yummy recipe.  I know it's been awhile since I've shared one!

Key Lime Sugar Cookies
Cookies:
1 cup sugar
1 cup powdered sugar
1 cup butter, softened
1 cup oil
1 tsp vanilla
2 eggs
4 1/4 cups flour
1 tsp baking soda
1 tsp cream of tartar
1 tsp salt

Combine sugar, powdered sugar, and butter; beat until light and fluffy.  Add oil, vanilla, and eggs; blend well.  Add flour, baking soda, cream of tartar and salt; mix well.  Cover with plastic wrap and refrigerate at least 2 hours.
Heat oven to 375.  Shape dough into 1-in. balls.  Place 2 inches apart on ungreased cookie sheets.  Flatten with bottom of glass (dipped in sugar if you'd like).
Bake for 8-10 minutes or until set but not brown.  Cool on racks.

Key Lime Frosting
2 cups powdered sugar
1/4 cup key lime juice
2 drops green food coloring
1 drop yellow food coloring
Frost cookies after they have cooled.