Pecan Pie Thumbprints

Directions

1. In a large bowl, cream butter and sugar until light and fluffy, 5-7 minutes. Beat in egg yolks and corn syrup. Gradually beat in flour. Refrigerate, covered, until firm enough to roll, 30 minutes.
2. For filling, in a small saucepan, combine confectioners' sugar, butter and corn syrup. Bring to a boil over medium heat, stirring occasionally. Remove from heat; stir in pecans. Remove from pan; refrigerate until cold, 30 minutes.
3. Preheat oven to 375°. Shape dough into 1-in. balls; place 2 in. apart on parchment-lined baking sheets. In a small bowl, whisk egg whites; brush over tops.
4. Bake 5 minutes. Remove from oven. Gently press an indentation in center of each cookie with the end of a wooden spoon handle. Fill each with a scant 1/2 teaspoon pecan mixture. Bake until edges are light brown, 4-5 minutes longer.
5. Cool on pans 5 minutes. Remove to wire racks to cool completely.