Spray an 8″ springform pan with cooking spray and then line the bottom and sides with parchment paper – set aside.
Peel 3 large or 4 medium apples – I used gala – then slice them into thin slices. Put the slices in a bowl and add 2 tbsps of sugar and 1 tsp of cinnamon – mix well. Let sit for about 10 minutes.
In the meantime, line rimmed baking sheet with either foil or parchment. After the 10 minutes, spread the apple slices out onto the sheet and bake at 400 degrees for about 10 minutes. Remove and cool. Remove about 20 slices and keep them separately – these will go on top later. Reduce oven temp to 350 degrees.
In a large bowl, mix 1-1/2 cups of flour 1-1/2 tsp baking powder, 3/4 tsp salt and 1 cup sugar. Mix well.
Add 1/2 cup melted butter, 2 beaten eggs, 1/4 cup sour cream, 1-1/2 tsp of pure vanilla and 1/8 tsp of almond extract. Mix well.
Spread half of this batter in the pan. Top with the apples (not the ones set aside) and then top with the rest of the batter covering the apples. Take the reserve 20 slices of apple and arrange them over the top.
In another bowl, mix 3 tbsps brown sugar, 2 tbsps white sugar, 3/4 tsp salt, 1/2 tsp cinnamon and 1/2 tsp orange zests. Mix well. Melt 1/4 cup and ad mix and then add 2/3 cup flour and mix well.
Sprinkle this streusel over the top of the cake. Bake for about 30 minutes. If it is browning too much, cover with a piece of foil at this point and bake another 25-30 minutes or till the proverbial toothpick comes out clean.
Cool in pan 10 minutes, then remove sides and cool completely.
Mix 1 cup confectioners sugar, 2 tbsps sour cream and 1 tbsps milk and mix well and drizzle over cake.