4 med.-sized Golden Delicious apples (any baking apple will do)
1 c. butter, softened
1 (16 oz.) container sour cream
2 1/2 c. all-purpose flour
1 tbsp. baking powder
2 tsp. baking soda
2 tsp. vanilla extract
4 lg. eggs
Streusel Topping

STREUSEL TOPPING: In bowl, mix into large pieces: 2/3 c. all-purpose flour 1/2 c. brown sugar, packed 4 tbsp. butter 1 tsp. cinnamon

I use my hands to mix it all together. Prepare Streusel Topping and set aside.

Grease 10 x 14 inch cake pan. Preheat oven to 350 degrees. Peel, core and thinly slice apples. In a bowl, toss apples with a couple of tablespoons of sugar.

In large bowl, beat butter with 1 1/2 cups of sugar, beat until light and fluffy with mixer at medium speed. Add sour cream and remaining ingredients; beat at low speed until blended, constantly scraping bowl. Beat for 1 more minute at medium speed

Spread batter in pan, making sure to push batter into the corners. Arrange apple slices on top, going out to the edge of the pan so batter doesn't bake up over the apples.

Sprinkle with Streusel Topping. Bake 45 to 50 minutes until cake pulls away from side of pan. Cool in pan on wire rack for 10 minutes. Serve warm or let cool to serve later.