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- 200 g (7oz) plain flour, plus extra to dust
- 50 g (2oz) Bird's custard powder
- 1 tsp. baking powder
- 75 g (3oz) caster sugar
- 125 g (4oz) unsalted butter, chilled, cut into cubes
- 1 medium egg
- 1 Tbsp. milk
For the filling
- 75 g (3oz) unsalted butter, softened
- 125 g (4oz) icing sugar
- 2tbsp Bird's custard powder
- Step 1
For the biscuits, put the flour, custard powder, baking powder, sugar and butter into a food processor. Pulse until the mixture resembles fine crumbs. Alternatively, rub the butter into the flour mixture using your fingertips.
- Step 2
Add the egg and milk and pulse until the mixture just comes together. Tip on to a work surface, bring together with your hands, then wrap in clingfilm and chill for at least 30min or up to 1 day.
- Step 3
Preheat oven to 180°C (160°C fan) mark 4. Line two baking sheets with baking parchment. Lightly flour a work surface and roll out dough until 3mm (⅛in) thick. Cut it into an even number of 3cm x 4.5cm (1¼in x 1¾in) rectangles, rerolling trimmings as needed. If you like, mark the rectangles with a diamond and a dot in each corner.
- Step 4
Put rectangles on prepared sheets and bake for 13-15min until lightly golden. Cool on the sheet for 3min, then transfer to a wire rack to cool completely.
- Step 5
Meanwhile, put the softened butter into a large bowl and sift over icing sugar and custard powder. Mix to combine (don't add water as it needs to be fairly thick). Set aside.
- Step 6
When the biscuits are cool, sandwich together with some of the filling, using a piping bag if you want a neater finish.
Per Serving:
- Calories: 95
- Total carbs: 13 g
- Sugars: 6 g
- Total fat: 5 g
- Saturated fat: 3 g

The GH Kitchen Team are Good Housekeeping’s resident recipe developers and all-round food obsessives. GH Kitchen Director Sarah Akhurst is our resident hosting pro and loves nothing more than putting on a foodie feast for friends. Our GH Kitchen Manager Linzi Pucino is our very own Italian food expert (originally hailing from the North East of Scotland!) and can be found working her way through midweek recipes that cover all bases, from haggis to ragu! Our Kitchen Editor Nadine Brown loves digging into the stories behind her favourite foods and enjoys applying her eclectic tastes to more modern, flavour-forward recipes - just don't give her too much chilli! Our Junior Food Content Produce Frankie Prichard combines a love of beautiful presentation and flavour-led, seasonal cooking in her recipe development, along with a passion for bringing people together through food. With a wealth of professional kitchen experience between them, they’re dedicated to ensuring every Good Housekeeping recipe is the best it can be, so you can trust they’ll work every single time
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