Thanks for all of that info, Cookiemookie! Great idea to play with the zests and oil and thanks for the heads-up that a little goes a long way. Hmm... I wonder if vanilla oil exists? I'd like to bump up the flavor on my sugar cookies.
Okay... back on theme...I actually remembered that I have Boyajian lemon oil and it makes fantastic pizzelles, so I will play with that. Thanks for the great ideas!
Edited to add that I just found a recipe for Butter Cookies with Citrus Oil on the Boyajian website. They aren't rolled cookies, but it might be something to play with. It does look like a lot of oil though. Here it is:
Butter Cookies With Citrus Oil
1 cup unsalted butter, softened
1 1/2 cups sifted confectioners sugar
2 large egg yolks
1 teaspoon vanilla extract
2 teaspoons Boyajian Lemon* Oil
1 3/4 cups all-purpose flour
1/4 teaspoon salt
Combine sifted flour and salt, set aside. In large bowl combine butter and sifted confectioners sugar. Beat with electric mixer until light and fluffy. Beat in egg yolks one at a time, add vanilla and Boyajian Lemon Oil and mix thoroughly. Add flour mixture and beat until well blended. Divide dough into 3 equal parts. Shape each part into a roll on waxed paper. Wrap and refrigerate at least 4 hours.
Preheat oven to 350 degrees. Cut dough into 1/4-inch slices. Place 1 inch apart on ungreased baking sheet. Bake 10 - 12 minutes. Cool slightly on baking sheet, then transfer cookies to cooling rack.
Yield: 5 dozen
*Boyajian Lime, Orange, or Tangerine Oil can be substituted for Lemon Oil