Step 1

Pre-heat the oven to 180/ 160 fan and line and grease 2 x 20cm round cake tins.

Step 2

Beat the sugar and butter together until light and fluffy.

Step 3

Add the eggs one at a time until combined.

Step 4

Place the walnuts in the food processor and grind them until they form fine crumbles.

Step 5

Pour the ground walnuts into a large bowl then whisk to mix with the teff flour, tapioca flour, baking powder, salt and coffee powder.

Step 6

Add the flour mix to the batter and mix until completely combined.

Step 7

Divide the batter between the cake tins and bake for 20-25 minutes until an inserted toothpick comes out clean.

Step 8

Remove from the oven and leave the cake layers to cool completely before icing.

Step 9

Beat the butter together with the icing sugar and mix until incredibly light and fluffy.

Step 10

Mix in the espresso powder and salt.

Step 11

To assemble, divide the icing between the middle and the top of the cake and decorate with walnut halves.