Add the rest of the ingredients, except for the almond meal and cassava flour, to the bowl. Stir until well-incorporated.
Add almond meal and cassava flour. Stir until well-combined. Batter will be very thick.
Pour batter into greased cast iron skillet.
Bake for 40 to 45 minutes, or until a toothpick inserted into the center of the cake comes back clean.
Cool.
Glaze
Beat cream cheese with hand mixer until fluffy, about 2 minutes.
Add remaining ingredients.
Put glaze into piping bag, or use the back of a spoon to drizzle the glaze atop the cake.
Notes
This cake keeps well in the fridge for up to 3 days. The cake itself freezes well, but if you do so, make a new batch of icing for the thawed-out cake.