Please refer to notes below if using raw almonds
Preheat the oven at 150 °C and line a large baking sheet with parchment paper.
Place almond flour in large mixing bowl, add sugar, and mix to combine using a spatula (skip this step is using home-made almond flour which was already mixed with sugar using the food processor)
In a separate bowl, whisk egg whites until stiff white peaks form.
Fold egg whites in almond and sugar mixture, add bicarbonate of soda and almond extract and mix to combine using a spatula. The mixture will become sticky and slightly wet.
Take 1 tsp. of the mixture, roll into a ball, roll into icing sugar and place on baking tray lined with parchment paper, leaving 1 inch of space between each cookie.
Bake in preheated oven for 25-30 minutes until top surface start cracking and bottom surface is slightly golden brown.
Remove from oven, cool on baking sheet for 10 minutes (cookies will be very soft when out of the oven, they will harden as they cool down!). Transfer to cooling rack to finish cooling.
Sprinkle with more icing sugar if desired.