Apple Cake (Upside down)

INGREDIENTS:
Makes about: 6 pieces
For topping:
2 tablespoons Butter
2 teaspoons Brown Sugar
A pinch Cinnamon powder
1/2 Red Apple (peeled, cored, sliced)

For cake:
1 cup All purpose flour
1/2 teaspoon Baking powder
1/4 teaspoon Baking soda

1/2 cup or 1 stick Butter
1/4 cup Sugar
1/4 cup Condensed Milk
1/2 teaspoon Vanilla essence

1/8 cup Milk (may be little more)
1 Red Apple (peeled, cored, finely chopped)

PROCEDURE:

Topping:

1. Grease a baking pan of 8 inch with butter and dust with some flour. 

2. In a small pan heat melt the butter over medium heat. Sprinkle in the brown sugar. Cook stirring constantly, until the mixture thickens slightly.

3. Add a pinch of cinnamon; remove from the heat.

4. Add the sliced apples and stir gently until evenly coated. 

5. Transfer to the prepared pan, spreading the apples in an even layer.

Cake:
1. Preheat the oven to 350F for 10 mins.
2. Dry ingredients mixture:
Sieve together flour, baking powder and soda.
3. Wet ingredients mixture:
Melt the butter, beat sugar, condensed milk, vanilla essence. Mix very well.
4. Pour dry ingredients mixture slowly to wet ingredients mixture, add the chopped apples and give it a mix. 

5. Gradually add the milk and mix everything well with a spatula until everything gets well mixed. Don't over mix. 

6. Pour the prepared batter on the toppings arranged. Tap the pan gently once or twice to remove any big air bubbles.
7. Bake for 30 minutes or the toothpick inserted comes out clean. Let it cool down for 10 minutes and then invert the cake over an wire rack and let it cool completely.

NOTES:
1. The original recipe is here.