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Preheat oven to 170c degrees and line baking trays with baking paper.
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In a large bowl, whisk sugar, oil and egg yolk until the mixture is smooth.
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Add maple, vanilla, ginger, cinnamon, cardamom and salt and beat into a smooth mixture.
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Sift in flour and baking soda and fold with a spatula until slightly sticky dough is formed.
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Using damp hands, roll cookies, dip in sugar and arrange on the tray.
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Bake for about 10 minutes until the cookies flatten, crack slightly, set at the edges and golden brown.
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Cool completely at room temperature and store in a sealed jar.