Preheat your oven to 350°F (180°C) and line a baking sheet with parchment paper. Lightly spray it with cooking oil.
Use a food processor or blender to finely grind the pistachios and walnuts. Be sure to leave some small chunks for texture. Reserve 2 tablespoons of this mixture for topping later.
Combine the ground nuts, almond flour, tapioca starch, baking soda, and cinnamon in a large mixing bowl. Stir to combine.
Stir in the coconut oil, vegan honey, and orange zest until a sticky dough forms. Adjust with extra almond flour or honey as needed to achieve the right consistency.
Roll the dough into 10 balls (about 1 tablespoon each) and place them on the baking sheet, spacing them about ½ inch apart.
Bake for 14 minutes, or until the edges are golden brown. Let the cookies cool on the baking sheet for 10 minutes before transferring them.
For the Syrup: Combine orange juice, orange marmalade, vegan honey, and cinnamon in a small saucepan. Simmer for 2 minutes until thickened.
Drizzle the warm syrup over the cookies and sprinkle with the reserved nut mixture.
Refrigerate the cookies for 10 minutes to set before serving.