Add the granulated sugar (A) to a medium saucepan. Caramelize over medium heat until the solution is brown (see picture; http://www.chez-k.org/classics/caramel-spread/).

In the meantime, add the cream to a small saucepan. Bring to a boil.

Add the cream to the caramel solution gradually. Please be careful, the solution may splash when you add the cream.

Add the granulated sugar(B) to the caramel solution. Heat the solution over medium heat until the granulated sugar(B) is dissolved.

More Details at
http://www.chez-k.org/english/classics/caramel-spread/