"Delia's All-in-one Sponge Cake with Raspberry and Mascarpone Cream recipe...."
INGREDIENTS
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6 oz (175 g) self-raising flour
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1 rounded teaspoon baking powder
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3 large eggs
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6 oz (175 g) caster sugar
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6 oz (175 g) butter, very soft at room temperature
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½ teaspoon vanilla extract
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8 oz (225 g) raspberries
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3-4 tablespoons soft set raspberry jam
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1 x 250 g tub mascarpone
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1 x 200 ml tub fromage frais
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1 level tablespoon caster sugar
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1 teaspoon vanilla extract
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a little icing sugar