Line a 9x13 inch baking dish with foil. Spray with nonstick spray.

Place semi-sweet chocolate in a microwave safe bowl. Microwave until chocolate is 75% melted, stirring after 30 seconds. Remove from microwave and continue stirring until completely melted. Stir in peppermint extract. Pour into prepared dish. Let sit until chocolate starts to harden.

Place white chocolate in microwave safe bowl. Microwave until 75% melted, stirring after each 30 seconds .. Remove from microwave and stir until white chocolate is melted. Pour over semi-sweet chocolate.

Sprinkle crushed peppermint candies on top of white chocolate. Press candy gently into the chocolate.

Let sit at room temperature until firm, at least one hour. I let it sit overnight.

Remove from baking dish by grabbing the foil.

Break into pieces. Store in airtight container.