Apple Crumble

Bahan-bahan (6 porsi)

• 2 lb / 1kg Granny Smith Apples( green apples) (, weight before peeling)
• 1 tbsp flour (, plain / all-purpose)
• 1/2 cup white sugar ((sub brown sugar))
• 2 tbsp lemon juice ((or water))
• 1/2 tsp ground cinnamon
• 1 cup rolled oats / oatmeal ((quick cooking is ok))
• 1 cup flour (, plain / all-purpose)
• 1 cup (loosely packed) brown sugar ((sub white sugar))
• 1/2 tsp baking powder
• 1 tsp cinnamon powder
• 125 g / 1/2 cup unsalted butter (, melted)
• Pinch of salt
• Vanilla ice cream