Lightly grease 8 x 6-inch square pan with shortening or cooking spray.
Place butter and chocolate in a large microwave safe bowl. Heat for 15-20 seconds in the microwave and stir well until the butter and chocolate are melted. Add in almond flour and mix well. Pat this mixture into the greased pan and set it in the refrigerator.
In a small bowl, beat 1/4 cup butter, whipping cream, peppermint extract, and food color with electric mixer on medium speed until well mixed. On low speed, gradually beat in powdered Swerve until smooth.
Spread peppermint mixture evenly over chocolate mixture. Refrigerate for 15-20 minutes For bars, cut into 5 rows by 5 rows.
Green food coloring in the frosting is optional.
Be careful not to over-microwave the chocolate, or it will start to harden and will ruin the recipe. The best practice is to stir to allow the melted butter to melt the chocolate the rest of the way.