The term "flourless" refers to a recipe or food item that does not contain any flour. Flour is made from grains such as wheat, and it's typically used as a thickening agent in cooking and baking. When a recipe is described as being "flourless," it means that the ingredient has been omitted, resulting in a dish with less carbohydrates or calories than usual. Flourless recipes are often popular among those who follow gluten-free diets since wheat flour is one of the main sources of gluten.