Name: Peach and raspberry crumble
Prep time: 25 min
Cook time: 65 min
Yield: 10
Cuisine: American
Ingredients: 3 to 4 kg firm, ripe peaches (10 to 12 large peaches); 1 orange, zested; 280g granulated sugar; 200g demerara sugar; 210g plain flour, plus 2 to 3 tbsp; 600ml raspberries; 1/4 tsp salt; 100g quick-cooking porridge oats; 250g cold unsalted butter, diced