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1
Cream the Butter and Sugar
5 Mins
Room temperature, about 20°C (68°F)
Beat the 200 g of softened butter with the caster sugar until pale and fluffy, about 3 minutes with a wooden spoon or an electric beater. The mixture should look light and feel smooth, with no sugar grit when you rub a little between your fingers.
Creaming beats air into the butter, which is the only lift these biscuits get — there is no baking powder.
Done when: Pale, fluffy and smooth.
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2
Mix in the Flour, Cocoa and Cornflakes
5 Mins
Room temperature, about 20°C (68°F)
Stir the sifted flour and cocoa into the creamed butter, then fold in the crushed cornflakes. Mix just until it comes together into a firm, crumbly dough — the cornflakes should stay in visible flakes, not turn to mush.
Stop as soon as the flour disappears; over-mixing crushes the cornflakes and makes the biscuits tough.
Done when: A firm dough with visible cornflake pieces.
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3
Shape and Bake
15 Mins
180°C (350°F)
Roll the dough into 24 balls about the size of a walnut, place them on the lined trays with space between them, and press each one flat to about 1 cm (1/2 in) thick. Bake for 15 minutes until the edges are firm and the tops look dry — the centres will still feel slightly soft, and that is right.
Press them flat before baking: round balls stay raw in the middle and crack on top.
Done when: Edges firm, tops dry, centres just set.
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4
Cool Completely
20 Mins
Room temperature, about 20°C (68°F)
Leave the biscuits on the trays for 5 minutes, then move them to a wire rack and let them cool completely, about 20 minutes. Warm biscuits melt the icing, so do not rush this step.
A wire rack stops the bases going soft from trapped steam.
Done when: Biscuits cold right through, firm and crisp.
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5
Make the Chocolate Icing
5 Mins
Hot water, about 80°C (175°F)
Sift the icing sugar and the remaining cocoa into a bowl, add the 25 g of soft butter, the vanilla and 2 tablespoons of hot water, and beat until smooth and glossy. Add hot water a teaspoon at a time if it is too thick — it should spread, not run.
Hot water melts the butter and cocoa into a glossy icing; cold water leaves it dull and lumpy.
Done when: Smooth, thick and glossy, holding a soft peak.
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6
Ice and Top with Walnut
10 Mins
Room temperature, about 20°C (68°F)
Spread a spoonful of icing on top of each cold biscuit, swirling it to the edges, and press one walnut half gently into the centre. Leave the biscuits for 20 to 30 minutes until the icing sets firm.
Ice generously — the thick icing cap is the signature look of an Afghan.
Done when: A thick chocolate cap with a walnut half set in the middle of each biscuit.
auto_awesome Finishing Touches & Plating
Leave the iced biscuits until the icing sets firm, about 30 minutes, then pack them into an airtight tin. They taste best the next day, once the icing has fully set and the cornflake crunch has settled.