8 oz (225 g) plain flour
5 oz (140 g) granulated sugar
4 oz (115 g) cold butter cut into 1 in (2.5 cm) pieces
1 tsp ground cinnamon
2 1/2 oz (75 g) soft light or dark brown sugar
Large pinch of ground allspice
2 lb (900 g) pitted plums, halved
Preheat the oven to 375°F (190°C, gas 5).
Place the flour in a large bowl. Using the tips of your fingers, rub in the butter until the mixture resembles breadcrumbs. Stir in the brown sugar.
Place the fruit, granulated sugar, and spices in the ovenproof dish and mix to combine. Spoon the crumble mixture on top. Bake for about 45 minutes or until the crumble is golden brown and the fruit is just beginning to bubble through the topping.