Preheat oven to 350 degrees. Line a baking sheet with parchment paper.
Mix all ingredients together until combined. Dough will be a vibrant purple color.
Roll dough until 1/4-inch thick. Using a cookie cutter, cut out treats. Re-roll remaining dough and cut out more treats. Repeat until dough is used up.
Place treats on the baking sheet and bake for 20-25 minutes, or until treats are brown around the edges and firm. Let cool completely before serving. Store remaining treats in an air-tight container at room temperature.