This healthy pineapple upside-down cake recipe is made with whole wheat flour, Greek yogurt, and coconut sugar. The cake is moist, fluffy, and has a delicious caramelized pineapple topping. To make the topping, you'll need fresh pineapple slices, coconut oil, and honey. The cake batter is made with whole wheat flour, baking powder, baking soda, Greek yogurt, coconut sugar, and vanilla extract. The result is a healthier version of the classic pineapple upside-down cake that is just as delicious and satisfying.