Preheat the oven to 350°F (175°C).

In a mixing bowl, cream together the softened butter and granulated sugar until smooth.

Gradually add the sifted flour, salt, and vanilla extract to the butter mixture, and mix until well combined.

Press half of the dough into the bottom of a greased baking dish.

Spread the apricot preserves evenly over the dough layer.

Crumble the remaining dough over the apricot preserves.

Bake for 30 minutes or until the top is lightly golden.

Allow to cool before cutting into bars.