In the bowl of your mixer, beat the sugar and eggs until smooth and light yellow in color. (If using organic sugar, be sure to beat until the sugar mostly dissolves.)
If you desire a 2-layer cake, wrap in plastic wrap and chill for 2 hours. Then, slice in half and fill with fruit glaze using orange juice. (See above recipe link.) You can also fill it with your choice of buttercream recipes. Use a sturdy buttercream like Ermine, American, or Italian. To use both as fillings, frost one layer with buttercream and the other with cooled glaze. Then, invert the glazed layer on top of the frosted layer. Finally, frost the entire cake. Alternatively, frost or glaze the top of the cake as desired.
Zest = only the bright orange color, none of the whitish-colored, fibrous portion.
*Refined coconut oil does not leave any coconut flavor where organic or unrefined does. You are welcome to use unrefined if you desire.
https://glutenfreerecipebox.com/gluten-free-orange-cake/