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confectioners cream; 1/2 teacup cold milk. 1 desertspoon cornflour. 1 tsp lemon juice. 1 egg yolk. 3oz castor sugar. make cornflour into smooth paste with milk and sugar, stir over gentle heat till thick, allow to cool then beat in egg yolk and lemon juice, use when completely cold. since the egg is not added till the mix is cooled I don't think it could be called cooked, which is why I wondered if I could freeze it, this recipe is exellent if like me you happen to find you've run out of icing sugar after you already made the sponge and want a filling, any help will be great.