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Halloween Cookie Bars

These Halloween Cookie Bars are a spooky treat perfect for parties! A buttery shortbread base is topped with rich black buttercream and decorated with cute white chocolate ghosts for a fun and festive bake. They’re easy to make, striking to look at, and a real crowd-pleaser.
Prep Time:25 minutes
Cook Time:25 minutes
Cooling Time:1 hour
Total Time:1 hour 50 minutes
Course: Dessert
Cuisine: British
Keyword: Easy Shortbread Recipe, Halloween Cookies, Halloween Desserts, Halloween Treat Ideas
Servings: 9

Equipment

Ingredients

For the shortbread base

  • 200 grams unsalted butter 1 cup
  • 100 grams caster sugar ½ cup
  • 250 grams plain flour 2 cups
  • 50 grams cornflour ½ cup
  • 1 teaspoon vanilla extract

For the buttercream

  • 150 grams unsalted butter softened (⅔ cup)
  • 300 grams icing sugar 2 ½ cups
  • 1 teaspoon vanilla extract
  • Black gel food colouring

For the ghosts

  • 150 grams white chocolate 1 cup
  • A few dark chocolate chips for eyes and mouths

Instructions

  • Make the shortbread base - Cream together butter and sugar until light and fluffy. Add flour, cornflour, and vanilla extract, mixing until it forms a soft dough.
  • Press and bake - Press the dough evenly into a lined 8-inch square tin. Bake for 20-25 minutes until pale golden and set. Leave to cool completely.
  • Prepare the ghosts - Melt white chocolate and pipe blobs onto a baking sheet lined with parchment paper. Using a palette knife or the back of a spoon, press into the blob and drag the knife to smear the chocolate - don't go too thin! Add tiny dark chocolate dots for eyes and mouths, or colour some white chocolate with black food colouring and use this. Let them set in the fridge.
  • Make the buttercream - Beat softened butter until pale and fluffy. Add icing sugar gradually, then vanilla and black gel food colouring until you get the perfect shade.
  • Assemble - Spread the black buttercream over the cooled cookie base. Top with your set white chocolate ghosts. Cut into squares and serve.