Mint Chocolate Wafers

1 large egg
1/3 cup water
3 tablespoons canola oil
1 package chocolate fudge cake mix (regular size)
1/2 cup cake flour

4 cups (24 ounces) semisweet chocolate chips
1/4 cup shortening
1/2 teaspoon peppermint extract

In a large bowl, beat egg, water and oil until blended. Gradually beat in cake mix and flour. Divide dough in half. Shape each into a disk; wrap in plastic wrap. Refrigerate 2 hours or until firm enough to roll.

Preheat oven to 350°. On a lightly floured surface, roll each portion of dough to 1/8-in. thickness. Cut with a floured 1-1/2-in. round cookie cutter. Place 1 in. apart on greased baking sheets. Bake 8-10 minutes or until firm. Remove from pans to wire racks to cool completely.

In top of a double boiler or a metal bowl over hot water, melt chocolate chips and shortening; stir until smooth. Stir in extract. Spread cookies with chocolate mixture. Place on waxed paper-lined baking sheets. Decorate with sprinkles. Refrigerate until set. Makes 10 dozen.