Put the butter and brown sugar in a mixer bowl. Start whipping at low speed, then increase the power.
Add the egg and vanilla, beat gently, then increase the speed until the mixture is smooth and light.
Add the baking powder and the Neo-Flour Premium Manioc to the previous preparation. Stir the batter using a spatula. Add the chocolate chips and mix again using a spatula.
Place in the fridge for 30 minutes.
Form the cookies and bake them for 8 min in a preheated the oven at 190 °C.