Take 1 kilogram of rye bread and cut it into pieces. Then put these pieces to electric stove and dry. Pound dried bread and fill up with 5 liters of boiling water. Wait for 6-8 hours and filter water, put in it 200 gram of sugar and 50 gram of dilute in 1 liter of water barm. Сover mix, in 12 hour fill bottle with kvass. Close bottles and let them stay in warm place for 24 hours. After that and can put bottles to the fridge and enjoy refreshing Russian kvass. Notice, kvass will have its best taste qualities in 4 days.
If you have no time to follow this recipe, use kvass concentrate to cook this beverage.
But of course, the easiest way to get kvass is to buy it. You can choose original taste free of any additional ingredients. Or try kvass containing berries or kvass with honey – it is really tasty and useful.