Apple Cider Vinegar (Best Option)
1 teaspoon per 1 tablespoon lemon juiceApple cider vinegar contains acetic acid similar to lemon juice, which helps to brighten the flavor of oatmeal and balance its natural sweetness. The mild fruity notes also enhance the overall taste without overpowering it.
When using apple cider vinegar, start with a smaller amount and adjust to taste since its acidity can vary by brand. Mix it well into the oatmeal to ensure even distribution.
Compared to lemon juice, apple cider vinegar provides a slightly earthier acidity but maintains the desired tartness, resulting in a similarly refreshing and balanced oatmeal flavor.