Step 1

Preheat oven to 180 degrees celsius. Line two baking trays with baking paper and set aside.

Step 2

Use an electric mixer to beat the butter and sugar until creamy and pale.

Step 3

Sift the plain flour and cocoa powder into the bowl and mix well.

Step 4

Add the cornflakes and mix through.

Step 5

Chill the dough in the fridge for 30 minutes.

Step 6

Shape tablespoonfuls of the mixture together and place onto the baking trays.

Step 7

Cook for 10-15 minutes. Remove from the oven and allow to cool for 10 minutes on the trays before transferring to a wire rack to cool completely.

Step 8

To make the chocolate icing, sift the icing sugar and cocoa powder into a bowl. Add the softened butter and 2 tbs of hot water. Mix together until well combined. Add an extra tablespoon of hot water if the icing is too thick to spread.

Step 9

Place a small spoonful of chocolate icing onto the top of each biscuit and top with a walnut.

Step 10

Preheat oven to 180 degrees celsius. Line two baking trays with baking paper and set aside.

Step 11

Cream butter and sugar on Speed 4, 30 seconds. Scrape and repeat 2 more times or until pale and creamy.

Step 12

Add the plain flour and cocoa powder and mix on Interval (kneading function) for 20 seconds. Scrape down the sides and repeat.

Step 13

Add the cornflakes and mix on Reverse, Speed 3, 5 seconds (use the spatula to help mix).

Step 14

Chill the dough in the fridge for 30 minutes.

Step 15

Shape tablespoonfuls of the mixture together and place onto the baking trays. Cook for 10-15 minutes.

Step 16

Remove from the oven and allow to cool for 10 minutes on the trays before transferring to a wire rack to cool completely.

Step 17

To make the chocolate icing, place all of the icing ingredients into the Thermomix bowl (using 2 tablespoons hot water). Mix on Speed 5, 15 seconds.

Step 18

Scrape down the sides of the bowl and repeat for a further 10 seconds or until smooth.

Step 19

Add an extra tablespoon of hot water if the icing is too thick to spread.

Step 20

Place a small spoonful of chocolate icing onto the top of each biscuit and top with a walnut.