Mom's Strawberry Jam
4 cups of strawberries
4 cups sugar
Juice of half a lemon
1 piece powdered alum (size of a pea)
1 tablespoon butter (reduces foaming)
Combine ingredients and bring to a hard boil that can't be stirred down. Boil for 10 minutes.
It is better to do two small batches keeping the same proportions if you have more than 5-6 cups of berries.
Put in a large container and let stand overnight. Stir occasionally.
Place in jars the next morning. Label and freeze.