Preheat the oven to 350 F degrees.
Spray coconut oil in several baking dishes.
In a mixing bowl, add all wet ingredients and mix. (*See note)
Gradually add dry ingredients and mix on low speed.
Pour batter into the baking pans, so each pan is 3/4 full.
Put the batter filled pans on a baking sheet and bake.
Bake for 20 minutes. (*See note)
Remove from heat and allow to cool.
Add all frosting ingredients to a mixer and mix on high speed.
Remove first cake from the pan onto a plate.
Spread lemon curd on the cake.
Add a layer of frosting.
Continue to stack until you have used all layers of cake.
Spread frosting on the top and sides of the cake.
Optional top with fresh lemon zest.