These delicious, allergy friendly, vegan, paleo cookies have a surprise hiding inside—they’re green! Sunflower seeds have a high amount of the free radical scavenger chlorogenic acid, which turns green when it meets baking soda during baking. The effect is completely harmless and makes for perfect St. Patrick’s Day cookies, with no food dye or hidden spinach. The cookies need to cool for about an hour to turn green, so resist the urge to eat them all hot out of the oven!