-
Preheat the oven to 160 degrees. In a bowl mix together the flour, baking powder, 4 tablespoons of the granulated sweetener, pistachio nuts, orange zest, and juice of half the orange. Add two whole eggs and separate the remaining two adding the yolks to the mixture.
-
In a pestle and mortar, gently crush 4 of the cardamon pods to release the seeds inside and place the seeds into the mixture.
-
Whisk the 2 egg whites until the form stiff peaks and fold gently into the mixture.
-
Pour into a lined square baking tin and bake for 30 minutes. Meanwhile, into a saucepan add the juice from the remaining half of the orange, and 1 tablespoon of granulated sweetener, 1 tablespoon of water and the remaining 2 whole cardamon pods. Heat gently until the sweetener has dissolved and take off the heat.
-
In a small bowl, add the icing sugar and mix with 2 teaspoons of the orange sugar syrup to form a thin icing.
-
When the cake is cooked, place on a wire rack and with a fork, prick several holes all over the cake. Pour over the syrup whilst still warm and let it absorb into the cake.
-
Once completely cool, spread over a thin layer of icing and cut into 16 pieces.