Coffee tiramisu cake

Instructions

1. Preheat the oven to Gas Mark 5/190°C/fan oven 170°C. Lightly grease 2 x 18cm sandwich tins with low fat cooking spray. Line the bases with circles of non-stick baking parchment or greaseproof paper.
2. Put the coffee powder or granules into a cup and add 1 tbsp boiling water, stirring to dissolve.
3. Whisk the eggs and sugar together using a hand-held electric whisk until pale, thick and very airy. This will take about 5 minutes. Whisk in the coffee liquid. Sift the flour into the mixture and fold it in lightly using a large metal spoon. Share the mixture between the cake tins and level the tops. Bake the cakes for 12-15 minutes, or until the tops spring back when pressed lightly. Cool on a wire rack for 5 minutes, then remove from the tins and peel away the lining paper. Cool completely.
4. Beat the quark with a wooden spoon until softened, then stir in the vanilla yogurt and 1 tbsp of the Tia Maria. Put one of the cakes on a serving plate and sprinkle the rest of the Tia Maria evenly over the surface. Spread half the quark mixture on top, then place the second cake in position. Cover with the remaining quark mixture and sprinkle with cocoa powder. Keep in the refrigerator until ready to serve, though allow time for the cake to come up to room temperature to enjoy it at its best.