This is a recipe I got years ago from Taste of Home. It was from a lady in Washington state.
2 cups (12-oz) semisweet chocolate chips
1 can (14-oz) sweetened condensed milk, divided
2 tsps vanilla extract
6-oz white candy coating
2 to 3 tsps peppermint extract
3 drops green food coloring
In a heavy saucepan, melt chocolate chips with 1 cup of the sweetened condensed milk; remove from the heat. Stir the vanilla into the chocolate mixture.
Spread half the chocolate into a waxed paper-lined 8-inch square pan; chill 10 minutes or until firm.
Meanwhile, in a heavy saucepan over low heat, cook and stir candy coating with the remaining milk until the coating is melted and the mixture is smooth. Stir in the peppermint extract and the food coloring. Spread mint mixture over the chilled bottom layer of candy; chill 10 minutes or until firm.
Warm the remaining chocolate mixture if necessary and spread over the mint layer. Chill candy for 2 hours or until firm.
Remove candy from pan, peel off the waxed paper, and cut into 1-inch squares.
Makes about 2 lbs of candy.