Chocolate Turtle Cookies

flour 1/3 cup of cocoa powder 1/4 tsp salt 1 stick of butter, softened 2/3 cup of sugar 1 large egg, separated; plus 1 egg white 2 tbsp milk 1 tsp vanilla 1 1/4 cup of pecans, chopped fine 14 soft caramel candies 3 tbsp heavy cream