What is one of the methods included on a recipe card for combining ingredients?

The correct answer, which includes all methods, recognizes that recipe cards often provide various techniques for combining ingredients to achieve the desired results in food preparation. Boiling, mixing, and stirring are all fundamental methods utilized in cooking.

Boiling involves cooking ingredients in water or broth at high temperatures, which can both cook and combine elements, especially when preparing soups or sauces. Mixing encompasses a broader category of combining various ingredients without necessarily using heat, which can apply to dry mixes or batters. Stirring is a specific technique within the mixing category that ensures even distribution and incorporation of ingredients, particularly in dishes like sauces or when integrating dry and wet components.

Including all these methods on a recipe card reflects the diverse techniques available for cooking and highlights the various ways ingredients can be combined effectively. Hence, the choice of "All of the above" acknowledges the multitude of approaches available to chefs using the recipe card, underscoring the variety in food preparation methods.