Key Lime Cookies

• Cookie dough
• 1 3/4 cups all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon baking soda
• 3/4 cup butter, softened
• 1/2 cup icing sugar
• 1 egg yolk
• 1 1/2 teaspoons grated key lime rind
• 4 teaspoons key lime juice
• Sugar Coating
• 1/4 cup granulated sugar
• 1/2 teaspoon grated key lime zest (scant 1/2 tsp (2ml)

1. Sugar Coating: In small bowl of food processor, whirl sugar and lime rind until sugar is fine. Transfer to bowl; cover and let stand for at least 2 hours or overnight. (If sugar clumps, break up into powder.).
2. Whisk together flour, baking powder and baking soda; set aside.
3. Beat butter and icing sugar until light and fluffy; beat in yolk, lime rind and juice. Gradually stir in flour mixture.
4. Transfer dough to pastry bag fitted with 1/2-inch/ 1 cm star tip (or plastic bag with corner cut out). Pipe out 1-1/2-inch/4 cm long cookies onto parchment paper-lined baking sheet.
5. Bake in 300u0b0F/150u0b0C oven until edges and ridges are just starting to turn golden, 25 to 30 minutes.
6. Important -
7. Roll in lime sugar while still warm; let cool on rack.
8. Makes about 3 dozen cookies.

dough, allpurpose, baking powder, baking soda, butter, icing sugar, egg yolk, lime rind, lime juice, sugar coating, sugar, lime zest

Taken from www.food.com/recipe/key-lime-cookies-295314 (may not work)