Mix dry ingredients: In a large bowl, combine flour, baking powder, sugar, spices, and salt.
Add fat: Rub or cut in the vegan butter with your fingers or a pastry cutter until the texture resembles coarse crumbs.
Bind: Stir in the plant milk, syrup, and vanilla until a smooth, firm dough forms.
If it feels dry, add 1–2 tsp more milk.
Don’t overmix — you want to preserve the crisp texture.
Chill: Wrap the dough and refrigerate at least 1 hour (overnight is best — the spices deepen beautifully).
Shape:
Roll out on a lightly floured surface to 4–5 mm thick.
Cut into rectangles or use traditional wooden speculaas moulds.
Re-roll scraps once.
Bake:
Preheat oven to 175 °C (fan 160 °C).
Place biscuits on a parchment-lined tray and bake 12–15 minutes, until firm and lightly browned at edges.
Cool: Leave on the tray 5 minutes, then transfer to a rack. They crisp fully as they cool.