- 1 tbsp cornstarch = 2 tbsp all-purpose flourA (for thickening sauces) (America's Test Kitchen)Make a slurry with 2 parts cold water, 1 part flour; whisk smooth before adding to the simmering liquid. Simmer 2–3 minutes longer than usual to cook out the raw flour taste.
- 1 tsp cornstarch = 1½ tsp arrowroot powder (America's Test Kitchen)Arrowroot makes a clearer, more translucent thickening than cornstarch — useful for fruit pie glazes and clear sauces. Avoid in dairy-based sauces; arrowroot turns slimy with milk and cream.
Safety
- AAll-purpose flour: Contains gluten; not safe for celiac or gluten-free diets.