Image source Twix Thumbprint Cookies Author: Alyssa Prep time: 15 mins Cook time: 10 mins Total time: 25 mins Serves: Serves: 24 Ingredients Shortbread Layer: ⅔ cup Unsalted Butter, softened ½ cup sugar 2 Eggs (yolks only) 1 teaspoon vanilla 1½ cups all-purpose flour Caramel Filling: 14 soft caramel candies (like Kraft Caramels) 3 T.