*Why do you dissolve baking soda in hot water for baking cookies?
First off, you use baking soda to help keep those peanut butter cookies from spreading too much (and becoming one giant cookie, as good as that sounds). But why mix it with hot water? Have you ever gotten a taste of pure baking soda? Yes? That’s why. Dissolving it a little bit, at the end of the recipe, and then combining it with all the other ingredients ensures that it’s evenly distributed within the mixture.