for those of us on low-carb/low-sugar diets, it is such a headache trying to find drinkable wines and ciders. thankfully, it’s simple and easy to make wines & ciders with brewsy with 1-3 grams of sugar per glass (we used welch's concord grape). here’s how:

1. decide how much wine/cider you are trying to make and the nutrition facts of your juice. for a half-gallon of welch's grape juice (8 fl oz servings), there are 36 total grams of sugar per serving.  
2. use the sweetness calculator on the “DRY” setting (10% as sweet as your juice) to determine how much sugar to add and juice to remove. for welch's concord grape, you would pour out 1.5 cups of juice (approximately 1 3/4 servings of juice) and add 0.75 cups of sugar.  This will allow your wine to have 3.6 g per 8 fl oz. since wine glasses are 5 fl oz, you will have 2.25 g sugar per glass (3.6 * (5/8) = 2.25).

• NOTE: it is important that you add sugar when making a keto recipe because our yeast will eat all the sugar in your juice and your wine will have no flavor. the added sugar cancels out with yeast enough so that there about 2 grams of sugar per serving.