Preheat oven to 350F, Line 2 large baking sheets with parchment paper, spray with pan spray.  Set aside.

In a large bowl, combine the flour, baking powder, baking soda, and salt. Set aside.

In a separate bowl, whisk together sugars and eggs, until well combined and smooth.  Pour into the bowl with the dry mixture, stir to combine.

Divide dough in 4 even pieces. Set one aside, combine the remaining 3.

Note: Gloves are really handy for this next part.

Flatten out the large dough section. Measure orange extract on top of it, tint with food colouring, and knead until flavour and colour are well distributed. Set aside

Flatten out the smaller dough piece, measure anise extract out on it, tint with black food colouring, and knead until flavour and colour are well distributed.

Divide each dough up into a bunch of pieces, pile together randomly. Gently squeeze together and knead / fold a few times to marble. Don’t over handle, or the colours will go muddy.

Divide dough in half, form into 2 long, wide loaves on the prepared pan.

Bake for 20-25 minutes, until golden brown on the outside.  Remove from oven, turn heat down to 250F.

Allow loaves to cool for 5 minutes.

Cutting on a slight diagonal, slice each loaf into ½" slices.

Arrange slices on the pans - still lined with parchment.  Bake for 15 minutes, flip each piece over and bake for another 15 minutes, or until desired texture.

Remove from oven, allow to fully cool.