Combine the flour,cinnamon,baking powder in a large bowl.
In a food processor whizz together-egg,apple,vanilla essence,butter(at room temperature) and Brown sugar for half a minute.
Pour the liquid batter in the dry ingredients.Combine well.
Add the diced apple.
Prepare the cupcake tray and line with muffin liners.
Fill the muffin liners till ¾ height.
Top with approximately 1 tablespoon of the crumble mixture on top.Press lightly.Repeat the process for other 5 cupcakes.
Bake for 20 minute in a preheated oven at 180 degrees.