Viennese Swirls

Serve these as individual cookies or sandwiched together with buttercream and a little jam. They've very light and crunchy, and one batch makes lots - so don't feel bad if you scoff more than one at a time! haha. You'll need: 

• 250g Plain Flour
  
• 250g Butter (softened)
  
• 50g Corn Flour
  
• 50g Icing Sugar
  
• 1tsp Vanilla Extract
  

For the drizzled topping

• 70g Plain chocolate
  
• 20-25g Butter
  
• Icing sugar to dredge (Optional)