Easy orange cake

Ingredients

• 120g whole wheat flour
• 80g all purpose flour
• 1 tbsp arrowroot (or corn starch)
• 100g white or brown sugar (powdered)
• 1 tsp baking soda
• 1 pinch of salt
• 250 ml of orange juice
• 2 tsp orange peel
• 3 tbsp oil
• 1 tsp vinegar
• 1 tsp vanilla extract
• 1 tsp ground ginger