TIP: We used Bramwell’s Smooth Biscuit Spread, sold in Aldi supermarkets. Use a double unfilled round sponge cake instead of a rectangular one, if preferred.
Ingredients
Method
Beat cream, sour cream, and icing sugar in a small bowl of an electric mixer until soft peaks form.
Place one sponge layer on a serving plate. Spread with a third of the cream mixture.
Warm Biscoff spread in Microwave on High (100%) for 20 seconds. Dollop half over cream. Gently swirl through the cream. Top with the remaining sponge layer.
Spread half of the remaining cream mixture over top. Dollop over the remaining spread. Gently swirl through the cream mixture. Spread the remaining cream over the sides of the cake. Arrange biscuits around the edge. Save the remaining biscuits for another use.
Decorate with blackberries just before serving.