With their help, he created the first powdered root beer, which consumers were to mix with yeast, sugar, and water. That version eliminated the laxative effect that had plagued the original recipe.

There’s the old yeast and sugar trick that takes place ... [Paul] himself has tried the dry ice in a cooler full of root beer method. The problem is that the cooler isn’t pressurized so ...

"I'll never forget it," he says. Her recipe was pretty standard — root beer syrup, sugar, yeast (all brought to her by boat) and the secret ingredient — cold lake water. The sparkle came from ...

Different brands have developed their own versions of root beer, ranging from extremely sweet to more herbal and complex. Some companies use yeast fermentation to create natural carbonation ...