Add sugar, Manuka Honey and unsalted butter to a medium sauce pan and melt them together over medium/low heat, whisking occasionally until sugar is melted. As soon as the sugar is dissolved, remove from heat and while hot, add in your beaten eggs in a slow steady stream while whisking vigorously until all of your eggs are incorporated.
Whisk in the baking soda until no lumps remain,then fold in your 3 cups flour 1/2 cup at a time with a spatula until the dough reaches a clay consistency and doesn't stick to your hands.
Cut the dough into 8 equal pieces and move on to the next step right away.
On a well-floured surface, roll each piece out into a thin 9" circle. You can sprinkle the top with a little flour too to keep dough from sticking to your rolling pin. Place a 9" plate or base from a spring form mold over your rolled dough and trace around it with a pizza cutter to get a perfect circle. Keep the scraps for later.
Transfer the dough to a large sheet of parchment paper and bake 2 at a time at 175oC for 4-5 minutes or until golden. Transfer to a wire rack and let cool completely before stacking. Repeat with remaining layers.
Finally bake the scraps separated evenly on are-used sheet of parchment. Once the scraps are baked, cooled and firm, pulse them in a food processor until you have fine crumbs.