A crisp chocolate cookie popular with children. The recipe came from a good friend who helped on the cake stall and later launched her own old-fashioned tea-shop.
Cream the butter with the sugar and vanilla essence. Gradually work in the flour sieved with the cocoa powder until well combined. Stir in the cornflakes. Shape a teaspoon of the mixture into a ball. Place on the prepared baking sheet and gently flatten the cookie but allow room for expansion. Repeat with the rest of the mixture.
Bake in the preheated oven until just firm. Cool on the b