Line a 9x11 inch baking sheet with parchment paper. Place chocolate melts into a large heat proof bowl and microwave according to package directions. Stir until creamy and smooth. Transfer to prepared baking sheet. Take small pieces of prepared cookie dough and gently press into melted chocolate. Sprinkle mini M and M's over melted chocolate. Let set and harden for at least 30 minutes then cut or break into pieces. Serve room temperature.
Place softened butter into a medium mixing bowl. Cream sugars until well combined. Add vanilla stirring well. Stir in flour, salt and chocolate chips until dough forms. Cover tightly with plastic wrap or lid until ready to use. Best if NOT refrigerated.