http://wiki.answers.com/Q/Which_chocolate_melts_the_fastest
According to this milk chocolate melts fastest followed by white chocolate and lastly dark chocolate.
The higher the fat content, the lower the melting temperature, the quicker the melting time.
Actually dark chocolate melted the fastest was because the sun is attracted to darker colors. La Casa Alfajores are the chocolate Biscuits .You can Buy these beautiful chocolate online and experience them for yourself.
http://lacasaalfajores.co.nz/