Makes 25-30
adjust servings:

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For the biscuits:

For the buttercream:

  1. Preheat the oven to 180˚C/160˚C fan/gas mark 4. Line 2-3 baking trays with non-stick parchment paper.
  2. In a large bowl, beat together the butter, vanilla and sugar until light. Sift in the flour and custard powder and mix until just combined. Stir in the milk.
  3. Use your hands to gather the mixture together to form a ball. Wrap the dough in cling film and refrigerate for at least 20 minutes or until firm.
  4. Remove the chilled dough and place on a floured surface. Roll the dough out to 5mm thick. Using a square cutter, cut out the biscuits and place onto the prepared baking trays, leaving enough space between each.
  5. Put the trays of biscuits in the fridge for at least 10-15 minutes.
  6. Remove from the fridge and use a cocktail stick to mark a dotted line around the edge of the biscuits.
  7. Bake for 10-12 minutes or until the biscuits are a pale golden brown colour. Remove from the oven and set aside to cool completely.
  8. In a large mixing bowl, beat together the icing sugar, custard powder and butter until smooth. If the icing is too thick, add one tablespoon of milk to loosen it.
  9. Pipe the icing onto one of the biscuits and top with another.

Nutrition Facts

Per biscuit (per serving):
189kcals, 10g fat (6.2g saturated), 24.1g carbs (10.6g sugars), 1.7g protein, 0.3g fibre, 0.085g sodium