4 cups mashed raspberries
4 cups sugar
1. Use a very large pot. When the jam reaches a full rolling boil it will double in volume.
2. Heat mashed berries until they reach a full rolling boil, boil 2 minutes.
3. Add sugar. Stir well.
4. Bring to a boil, stirring constantly, boil for 2 minutes. Remove from heat.
5. Beat with rotary beater for 4 minutes. Pour in sterilized jars and seal.