Next you add to it some sort of acid. Lemon juice or apple cider vinegar is what I use. Add about a
teaspoon for a small batch and maybe a tablespoon for a larger batch of pancakes. The acid reacts with the baking soda or powder that is in the recipe and causes the mix to bubble a little bit. Now to counteract the sour you just added, add an equal amount of sugar if you'd like. That's what I do. Let the mix sit for a few minutes to get some good bubble action and then make as usual.