Best Apple Crumble Recipe

Ingredients

• 6 large Granny Smith apples - peeled, cored and chopped
• 2 tablespoons white sugar
• 0.5 cup butter
• 1 egg
• 2 cups all-purpose flour
• 1 teaspoon baking powder
• 0.25 cup custard powder
• 0.75 cup white sugar
• 0.75 cup butter
• 1.25 cups all-purpose flour
• 2 teaspoons ground cinnamon
• 0.33333334326744 cup shredded coconut
• 0.33333334326744 cup rolled oats