WHISK together all ingredients in a medium pot. Once combined, place over medium-high heat.
COOK for 2-3 minutes, stirring continuously until thickens. Don’t walk away or stop stirring to ensure the starch is evenly distributed and the result is smooth.
ONCE thick, remove from heat and either use for desired recipe or add to a sealed container. Soup will thicken even more as it cools.
REFRIGERATE for up to 1 week, if not using immediately, or freeze for up to 3 months. If frozen, thaw in the fridge overnight before using.