In a medium bowl, combine the flour, baking powder and baking soda and set aside. (see note 5)
In a large bowl, combine the olive oil, sugar, ouzo, orange juice and zest.
Using a spoon, slowly add the dry ingredients to the wet ingredients until you have a soft, pliable dough.
Add the almonds and fold through the dough, ensuring not to overwork it.
Divide the dough into three portions and shape it into a flat log. The log should measure approximately 25 cm (10") in length and 10 cm (4 ") in width.
Place the shaped log onto a parchment-lined baking sheet and score the top using a sharp knife. Score the dough at approx 1.5 cm (half an inch), sprinkle the sesame seeds and bake in a preheated 180°C (350°F) oven for approximately 45 minutes. Allow cooling completely. (see note 6)
Using a serrated knife, cut through the loaf gently (use the pre-scored lines as your guide) to create the paximadia cookies.
Place on a parchment-lined baking tray and bake again in a preheated 140°C (280°F) for 30 mins - turning them over halfway. (see note 7)
Once baked and crispy, allow them to cool completely before enjoying them with Greek coffee or tea.