Preheat oven to 375 degrees. (Or follow manufacturer's instructions depending on what brand you are using.) Pop open the can of crescent rolls and separate the triangles. Evenly spread about 2 teaspoons of Biscoff spread on each one and add ¼ teaspoon cinnamon sugar on top of spread. Roll crescent rolls up, sprinkle some more cinnamon sugar on top of rolls and place on baking sheet. Repeat this process until all crescent rolls are prepared. Bake for 9-12 minutes (or again, follow manufacturer's instructions) or until lightly golden.