Bored of your granola? Liven up your granola routine by giving the breakfast treat a boost of energy from instant coffee.

For most adults, the FDA recommends no more than 400 milligrams of caffeine per day, or about two to three 12-ounce cups of coffee. A slice of cake is less than a tenth of that daily recommendation.

Do certain coffee brewing methods extract more caffeine than others? We chat with a coffee brewing expert about caffeine content of each type. Whether it’s cold brew, espresso, or good ol’ pour over, ...