The Where Used Tool allows you to see where each ingredient is used, or where recipes are used within other recipes. For example which Serving Recipes use a Prep Recipe.
1. Choose an ingredient or a recipe. You will see the Edit/Tools/Cancel buttons at the top right of the screen below your unit name.
2. Click Tools and Where Used and you will see a pop up listing all the recipes that use this ingredient:
3. Or choose Where Used for a recipe: