Ingredients2 tablespoons butter for greasing the cake panStreusel Topping1/4 cup light brown sugar1/4 cup granulated sugar1/2 cup all-purpose flour1 teaspoon ground cinnamon1/4 cup cold unsalted butter, cut into tablespoon-sized piecesCake Ingredients2 cups all-purpose flour1 teaspoon baking powder1/2 teaspoon baking soda1 teaspoon salt1/2 cup unsalted butter, at room temperature1 cup sugar2 large eggs1 cup sour cream or whole milk yogurt1 1/2 teaspoons vanilla extract1/2 cup milk1 1/2 cup peeled,cored and sliced applesPreheat oven to 350 degrees Farenheit. Butter a 9-inch bundt, tube or springform pan.For the streusel topping, mix together the brown and white sugars, flour and cinnamon. Cut in the butter with a pastry blender or a knife and fork until the mixture resembles coarse crumbs. Set aside.Sift or mix together the flour, baking powder, baking soda and salt. With a mixer, beat the 1/2 cut butter and sugar in another bowl until light and fluffy, about 3 minutes. Beat in eggs, one at a time. Add the sour cream, vanilla extract and milk and beat until smooth. Stir in the flour mixture and beat evenly.Pour about half of the batter into the greased pan, smooth the top and sprinkle in half of the streusel. Top with the sliced apples. Add remaining batter, smoothing over the streusel and top with the remaining streusel.Bake cake on the middle shelf of the oven for about 45-50 minutes or until a knife comes out clean. Cool on rack for about 10 minutes.From Spices of Life-Simple and Delicious Recipes For Great Health by Nina SimondsI topped the apple cake with candied apples made by sauteing apples and brown sugar together for about 10 minutes and purchased apple butter. A dollop of creme fraiche to finish.