By Fiona Cairns
You can use filter, espresso or instant coffee... whatever you prefer and have in the cupboard. And you can choose which nuts you would like; you may want the more classic combination of coffee with walnut or pecan, or try almonds or even macadamias.
Lightly butter 2 × 20cm diameter, 4.5cm deep, sandwich tins, then line the bases with baking parchment.
Scatter the nuts for both the cake and the buttercream on to a baking sheet and