Preheat the oven to 350º F.
Spray a 10 inch cake pan with coconut oil.
Line the bottom of the cake pan with parchment paper. I recommend using a springform pan. Be sure to wrap the outside bottom in foil to prevent leaks in the oven.
In a large bowl, add sugar, vanilla, and butter and mix 3-5 minutes.
Beat in the eggs one at a time.
Sift together the flours, cinnamon, baking powder and salt.
Gradually add the flour mixture to the bowl, mixing on low, alternating between milk and flours.
Pour the batter into the cake pan.
Add the sliced apples on top.
Pour the cream on top of the apples.
Sprinkle the remaining ¼ cup sugar on top of the cake.
Place the springform pan on a baking sheet, or wrap the bottom in tin foil just in case there is a leak in your springform pan! Bake for 45 minutes.
Remove from the oven and place on a cooling rack.