Citric acid

Lemon juice contains citric acid, a naturally occurring acid, thus powdered citric acid is a great alternative to lemon juice, especially in baking. Citric acid has been a common ingredient in foods, cosmetics, and many other products for more than a century, mostly as a preservative and flavor enhancer.

In terms of acidity, one teaspoon (5 grams) of citric acid is comparable to around half a cup (120 ml) of lemon juice. As a result, just a very small amount is needed. To maintain the proper dry-to-wet ingredient ratio, it can also be required to increase the amount of liquid in your recipe. Additionally, using citric acid in baked products may even stop the cooking process from destroying some vitamins and antioxidants.