In a microwave-safe 2-cup glass measure, place the 6 ounces semisweet chocolate and 1 tablespoon shortening. Microwave chocolate mixture on 100 percent power (high) for 1-1/2 to 2 minutes or just until melted, stirring every 30 seconds.

Dip half of each halved cracker in the melted chocolate; use a small spatula to smooth out chocolate, if necessary. Place cracker on a cookie sheet lined with waxed paper. If desired, while chocolate is still soft, lightly press small white candies into chocolate to resemble dots on dominoes. Chill crackers for 10 minutes or until set.

In another microwave-safe 2-cup glass measure, place the white chocolate and remaining 1 tablespoon shortening. Microwave chocolate mixture on 100 percent power (high) for 1-1/2 to 2 minutes or just until melted, stirring every 30 seconds.

Dip plain half of each cracker in melted white chocolate. Place on a cookie sheet with waxed paper. If desired, while chocolate is still soft, press miniature semisweet chocolate pieces into white chocolate to resemble dots on dominoes. Let crackers stand until set. Makes 24 cookies.

Layer crackers between waxed paper in an airtight container; cover. Store at room temperature for up to 3 days or freeze for up to 1 month.