Apple crumble cake has been called an American and an English tradition, and with good reason. The English love their apple tea cakes that are quick, easy to make and go well with tea or coffee. Americans cherish their apple pie, so any other dessert made with apples is also revered. When making your apple crumble cake, choose apples that are soft and stay away from any really tart apples. The key thing to remember when making this treat is to ensure the cake part is cooked correctly, because the undercarriage apples cook more slowly then the rest of the dish.
Preheat the oven to 350 degrees F. Grease an 8-inch-wide by 8-inch-tall cake pan lightly with margarine.
Add the flour and baking powder to a sifter, then sift them together into a bowl. Add the sugar and salt mix with a spoon.
Toss the milk, beaten egg and melted butter into the bowl and use a mixer to combine until smooth and creamy. Pour into the baking dish and set aside.
Create the crumble mixture in a separate pan. Melt the butter on the stove top and add in the sugar, flour and cinnamon. Mix with a spatula until it is dense and crumbly. Turn off the heat.
Peel, core and chop up the apples into 2-inch pieces. Place these uniformly on top of the batter in the cake pan, in any design you wish or just laying across in straight lines. Sprinkle the crumble mixture generously and evenly over the apples.
Bake the dish for 40 minutes to 45 minutes. Remove from oven and let sit for five minutes. Cut the apple crumble cake into squares and serve warm.