Lime flavored rolled cookies.
Preheat oven to 350 degrees F (175 degrees C). Grease cookie sheets.
In a large bowl, cream butter, sugar, egg, and egg yolk until smooth. Stir in lime juice and lime zest. Combine the flour, baking powder, and salt; blend into the creamed mixture. Form dough into 1/2 inch balls, and arrange on the prepared cookie sheet.
Bake 8 to 10 minutes in the preheated oven, or until lightly browned. Cool on wire racks. Sift confectioners' sugar over cookies while still warm.
Per Serving: 74 calories; protein 0.8g; carbohydrates 11.4g; fat 2.9g; cholesterol 17.6mg; sodium 66.3mg.