Name: Triple berry cobbler
Prep time: 10 min
Cook time: 50 min
Cuisine: American
Ingredients: 490g mixed berries (fresh or frozen); 1 1/2 tsp ground cinnamon; 1 1/2 tsp lemon juice; 125g plain flour; 250g sugar, divided; 1 tsp baking powder; 120ml milk; 3 tbsp butter, melted; 1 tbsp cornflour; 240ml boiling water