I have a tattered copy of this recipe for Shamrock Cookies that I cut out of some newspaper years ago. This recipe uses a rather unusual ingredient, kool-aid, which gives the cookies a sweet-tart like taste and a light green color. I've adapted this recipe for other holidays as well, such as using cherry drink mix for Valentine's Day.
2 ½ cups four
3/4 teaspoon baking powder
1 package (.13) ounces) unsweetened lemon-lime powdered drink mix (i.e. kool-aid)
1 cup unsalted butter, softened
1 cup granulated sugar
1 large egg
1/2 teaspoon vanilla extract
1 egg white slightly beaten (to brush the cookies with)
Green decorating sugar (to sprinkle the tops with)
1. In a mixing bowl, stir together the flour, baking powder and powdered drink mix. Set aside.
2. In another bowl, beat butter, white sugar and egg. Add vanilla. Add flour mixture from step 1.
3. Using your hands, form the mixture into 2 separate balls. Wrap each in plastic wrap and refrigerate for 1 hour.
4. Roll out 1 ball at a time on a lightly floured surface until 1/4" thick. Cut with shamrock cookie cutter and place on a baking sheet. Brush with egg white and sprinkle with green sugar.
5. Bake 9-11 minutes.