Cherry Cordial Chocolate Thumbprints

1 cup butter
1 cup white sugar
2 eggs, separated
2 (1 ounce) squares unsweetened chocolate, melted
1 teaspoon vanilla extract
2 cups all-purpose flour
1/2 teaspoon salt
48 milk chocolate cherry cordial candy kisses, unwrapped
1/3 cup granulated sugar for decoration

1. Preheat oven to 350 degrees F (175 degrees C). Grease cookie sheets.

2. In a medium bowl, cream the butter and sugar together. Stir in 2 egg yolks, melted chocolate, and vanilla. Sift together the flour and salt; stir into the creamed mixture.

3. Roll dough into walnut sized balls. Roll balls in sugar (or chopped nuts if desired). Place the cookies onto the prepared cookie sheets and make a small indentation in the center with your thumb. Bake for 10 to 12 minutes in the preheated oven. When the cookies come out, press a chocolate kiss into the center of each one. Cool completely. Store in air tight container.