Preheat the oven to 350°F (175°C). Grease a baking dish.

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

Beat in the eggs one at a time, then stir in the vanilla extract.

In another bowl, whisk together the flour, baking soda, and salt. Gradually add to the creamed mixture until just blended.

Spread half of the cookie dough into the bottom of the prepared baking dish.

Spread the fruit preserves evenly over the dough.

Drop spoonfuls of the remaining cookie dough over the preserves, spreading gently to cover.

Bake for 25-30 minutes or until golden brown. Allow to cool completely.

In a small bowl, whisk together the powdered sugar, milk, and vanilla extract until smooth.

Drizzle the glaze over the cooled cookie bars and sprinkle with optional sprinkles.