Preheat the convection oven to 185°C.
Put the egg in a bowl, add the sugar and beat with a fork.
Add the sunflower seed oil and beat with a fork, add the rice flour, the vanilla powder, the baking powder and the salt, mix until the mixture is homogeneous.
Add the chocolate drops and mix.
Using the ice cream scoop, create 5 cookies on the non-stick micro-perforated mat, put in the oven, reduce the temperature to 180° C and bake for 15 minutes.