In a large bowl, combine the dry ingredients-- coconut flour, baking soda, orange zest.
Add in the wet ingredients, mixing as you go, ending with the eggs and combining well.
Pour the cake batter across the orange-caramel mixture already in your cake tin, ensuring it's spread out evenly to the edges of the tin.
Bake in a preheated oven at 350 for 40 minutes. Remove from the oven and allow the cake to cool *completely* before attempting to flip.
Cake flipping: In order to flip the cake, I allow it to get a bit cold for a more firm flip, putting it in the fridge for a bit. Then, take a sharp knife and it's best to delicately contour the outside-edge of your cake before you flip in order to loosen everything. Take a plate that will fit the bottom of the cake entirely, and place it directly on top of the cake tin, gently moving the cake tin so it is now upside down, on top of the plate, and then gently shimmying the cake out of the tin and directly on to the plate.