Here’s how to double or triple baking recipes with ease—and when to think carefully if you should multiply the recipe. Knowing how to scale up a recipe, especially when it comes to baking, is a skill.

Samantha Seneviratne, recipe developer, food stylist, and author of The Joys of Baking: Recipes and Stories for a Sweet Life Jason Schreiber, food stylist, recipe developer, and author of Fruit Cake: ...