- Canola-oil cooking spray
- 2/3 cup flour plus extra for dusting
- 3 tbsp unsalted butter, softened
- 2/3 cup plus 1 tbsp raw cane sugar
- 1/4 cup lowfat buttermilk
- 2 egg whites
- 1/3 cup polenta (or cornmeal)
- 3/4 tsp baking powder
- 3/4 tsp vanilla extract
- 4 Granny Smith apples, peeled, cored and thinly sliced
- Heat oven to 350°F. Coat a 9″ cake pan with cooking spray; dust with flour. Beat butter and 1/3 cup sugar in a bowl with an electric mixer until fluffy. Beat in another 1/3 cup sugar. Add buttermilk, then egg whites one at a time, beating well. In another bowl, mix flour, polenta and baking powder. Add to butter mixture along with vanilla; mix. Pour into pan; arrange apples on top. Sprinkle with remaining 1 tbsp sugar; bake 45 to 55 minutes.