Butter biscuits

Butter biscuits for air fryer in Air fryer. It can be served as a dessert or breakfast, very easy to make.
Ingredients
Instructions
Mix the butter and sugar in a bowl until it is well integrated
Then, add the egg yolk, and mix again until it is well integrated
Once mixed, add the flour and mix again
After, finish integrating it with your hands, the idea is to make a ball of dough
With the ball, we make a roll by kneading it on a surface, when we have it, we cut it in half and repeat again to have two rolls
Wrap it in plastic film, and put it in the fridge for half an hour so that the butter in the rollers takes shape
Cut the roll to the thickness that the biscuits are going to be, I recommend a centimetre or so
Put parchment paper in the basket, and place them taking care that they do not touch
Put them in our air fryer at 180 degrees for about 15 minutes
If after this time they are still not ready, leave them for another 3 minutes
Let them cool on a wire rack