Preheat your oven to 350°F (175°C).
Grease and line four 8-inch round cake pans with parchment paper.
In a large bowl, rub the orange zest into the granulated sugar and light brown sugar until fragrant.
In another large bowl, whisk together the flour, baking powder, baking soda, salt, and ground almonds.
In a separate bowl, mix the applesauce, yogurt, buttermilk, melted coconut oil, and vanilla extract until smooth.
Add the orange sugar to the wet ingredients and mix until combined.
Add the wet ingredients to the dry ingredients, mixing until just combined.
Divide the batter evenly among the prepared pans.
Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cakes to cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.