Birch beer can be brewed at home to provide a sweet, refreshing drink. Made from birch sap and birch twigs, it is a nonalcoholic beverage similar in taste to root beer. Making your own birch beer takes time and patience. However, if you are willing to complete the process, you can have your own homemade refreshment in about a week's time.
Combine the birch sap and honey in a large pot and bring to a boil. Boil for 10 minutes.
Finely cut the birch twigs and place them in the other stock pot while the mixture is boiling. After 10 minutes, pour the sap-and-honey mixture over the birch twigs and stir well.
Spread the cake of soft yeast over the top of the twigs, sap and honey with a spatula. Toast the piece of rye bread and place it on top of the liquid. Cover the entire pot with cheese cloth and allow to ferment for one week.
Strain the liquid well to remove the twigs.
Bottle the birch beer and secure the caps onto the bottles tightly. Store the beverage in a cool, dark place for about three months before opening. Chill the birch beer prior to serving.