Source: The Famous Melanie
1 cup butter
1/2 cup confectioner's (powdered) sugar
2 cups all-purpose flour
1 teaspoon vanilla
2 cups mini chocolate chips or 12 ounces finely chopped chocolate
1 tablespoon shortening
1 cup finely chopped, toasted nuts (optional)
Preheat oven to 350°. Cream butter and sugar until smooth, add vanilla and continue to mix until combined. Incorporate flour and half of the chocolate. Roll dough out into logs that are 1/2" wide and 2" long, place on greased or parchment-lined cookie sheet. Cook for 10-13 minutes. Allow cookies to cool completely on cookie sheet as shortbread can be brittle.
Melt remaining chocolate with shortening over a double boiler. Dip one end of each cookie into the melted chocolate and then roll in nuts. Place on waxed paper to set.