Adapted from Martha Stewart
Preheat the oven to 350 degrees. Grease and flour a large Bundt pan.
Add all-purpose flour, whole wheat flour, baking powder, baking soda, 1 teaspoon cinnamon and salt in a large mixing bowl and whisk until combined.
In a separate bowl, add 1 1/2 cups sugar, apple cider, olive oil, applesauce, vanilla and eggs and whisk until combined.
Pour the egg mixture into the flour mixture and mix until just combined.
Pour the batter into the prepared bundt pan.
Bake cake for 45-50 minutes or until toothpick comes out clean.
Allow the cake to cool in the pan on a wire rack for 15 minutes. Invert the cake onto the wire rack.
Mix together 1/4 cup sugar with 1/2 teaspoon cinnamon in a small bowl.
Melt butter and brush evenly onto the warm cake. Sprinkle with cinnamon sugar.
Let cool completely.