Is 1 teaspoon of sugar the same as 1 teaspoon of splenda?

No, 1 teaspoon of sugar is not the same as 1 teaspoon of Splenda. Sugar is a natural sweetener that contains calories, while Splenda is a brand of sucralose, an artificial sweetener that is calorie-free and much sweeter than sugar. Typically, a smaller amount of Splenda is needed to achieve the same level of sweetness as sugar. Therefore, when substituting one for the other, it's important to adjust the quantity accordingly.