Creating Ghriba cookies is a straightforward process that even novice bakers can master. Follow these steps to achieve the perfect crumbly texture and rich almond flavor:

1. Prepare the Oven: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper to prevent sticking.
2. Mix Dry Ingredients: In a large mixing bowl, combine the almond flour, granulated sugar, baking powder, and salt. Mix well to ensure even distribution of the ingredients.
3. Whisk Wet Ingredients: In a separate bowl, whisk the eggs and almond extract together until well combined.
4. Combine Ingredients: Gradually add the wet ingredients to the dry mixture, stirring continuously. Add the lemon zest and continue mixing until a dough forms.
5. Shape the Cookies: Using your hands, form small balls of dough, approximately 1 inch in diameter. Place each ball onto the prepared baking sheet, leaving space between each cookie.
6. Decorate (Optional): Press a whole almond or some slivered almonds gently into the top of each cookie for added texture and visual appeal.
7. Bake: Place the baking sheet in the preheated oven and bake for 12-15 minutes, or until the cookies are lightly golden on the edges.
8. Cool and Dust: Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Once cooled, dust with powdered sugar for a lovely finish.