You want $self->SUPER::write_export_log($log_vars). "SUPER::blah(...)" is a special incantation that calls the parent's definition of "blah".

Perl always passes the thing to the left of -> as the first parameter to your method subroutine, so any method call that acts on "$self" should always begin $self->blah(...). You didn't say what kind of warnings you got when you tried to call $self->write_export_log(...) but I'm guessing that you got something like "Deep recursion on subroutine..." if you did it inside of

package SubclassOfBase;
sub write_export_log {
  my $self = shift;
  $self->write_export_log();
}
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Leads::Export::Base->write_export_log($log_vars) didn't do what you wanted either because it was passing the classname as the first parameter to write_export_vars instead of the object ($self).

Best, beth