Healthy Vegan Shortbread Bars (Gluten Free, low-FODMAP)

Name: Healthy Nut Butter Shortbread Bars
Prep time: 30 min
Ingredients: 1 cup Peanut Butter; 1 cup Coconut Flour; 1/2 cup Maple Syrup; 3.5 oz Dark Chocolate (100g); 1/4 cup Peanut Butter; 2 tbsp Coconut Oil; Handful Chopped Walnuts; 2 tbsp Puffed Amaranth; 1/8 tsp Sea Salt Flakes (optional)