Blueberry Cookies

Bahan-bahan (30 porsi)

• ½ cup (1 stick) butter, (at room temperature)
• 1 cup granulated white sugar
• 1 large egg, (beaten)
• ½ teaspoon lemon extract
• ½ cup milk
• 2½ cups all purpose flour, (sifted)
• 1 cup fresh blueberries, (picked over and stems removed)
• ½ cup powdered sugar, (sifted)
• 1 to 1½ tablespoons freshly squeezed lemon juice