Remember, cornstarch loses its thickening power at very high temperatures, so add it toward the end of cooking. Arrowroot is an excellent, gluten-free, and paleo-friendly thickener that works well ...

How to substitute: As a general rule of thumb, use twice as much flour as cornstarch or arrowroot. Cornstarch is a super-effective thickener that doesn’t need much time to cook, although it does ...