Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine almond flour, coconut flour, granulated sugar, baking powder, and salt.

Add cold, cubed unsalted butter and work it into the dry ingredients until it resembles coarse crumbs.

In a separate bowl, whisk together eggs, almond milk, and vanilla extract until well combined.

Pour the wet mixture into the dry ingredients and stir gently, adding in any optional ingredients if desired.

Turn the dough out onto a lightly floured surface and shape it into a disc about 1-inch thick.

Cut the disc into 8 wedges and place them on the prepared baking sheet.

Bake for 15-20 minutes until golden brown and a toothpick comes out clean.

Let cool on the baking sheet for 5 minutes before transferring to a wire rack.