Mix the ground almonds, 70g powdered sugar, cinnamon and, if using, cardamom and ginger in a bowl. Then add the orange juice and zest and mix until a batter is formed. It should hold together when you pinch it with your fingers. If it is still too dry, just add a little more orange juice.
Then shape the dough into a ball, wrap in cling film and refrigerate for about 45 minutes. Preheat the oven to 175 degrees Celsius. Roll out the cold dough thinly (0.5 to 0.7cm) between two layers of baking paper, cut out the stars and place on baking paper on a baking sheet.
Bake the cinnamon stars for about eight minutes. The baking time can vary slightly depending on the thickness and size of the stars.
For the glaze…
…mix the rest of the powdered sugar (70g) with a tablespoon of water until it has a creamy consistency. If the glaze is too thick, you can add a little more water – if it is too thin, add a little more sugar. Spread the glaze on the cooled orange and cinnamon stars and let them dry.