INGREDIENTS
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SHORTBREAD CRUSTS:
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450 g (1 lb; about 4 1/4 cups) pastry flour*
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250 g (2 stick + 5 tsp) butter or margarine
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100 g (1/2 cup) granulated sugar
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1 whole egg
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a pinch of baking powder
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CUSTARD FILLING:
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1 liter (4 cups + 4 Tbsp) milk
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6 eggs, separated
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300 g (1 1/2 cup) granulated sugar
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80 g (1/2 cup + 2 Tbsp) all-purpose flour
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2 Tbsp rum
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2 tsp vanilla extract