Preheat your oven to 170c. Grease 2 large baking trays and set aside for now.
In a bowl with a hand held mixer, beat the coconut oil and sugars together until smooth and creamy.
Gradually stir in the egg and vanilla extract and continue to beat until all combined.
In a separate bowl, sift the plain flour, baking powder, bicarbonate and salt. Add to the wet ingredients and mix until smooth. Fold in the porridge oats and desiccated coconut with a spatula or metal spoon.
Roll roughly a tablespoon of the mixture into balls and place on the baking sheet around 5cm apart, flatten each ball slightly by hand.
Bake until golden brown, about 12 - 15 minutes, depending on your oven, then transfer to a wire rack to cool completely. Store in an airtight container and they will last for up to 2 weeks.