Microwave strawberry jam 1 cup Crushed strawberries 2 ts Lemon juice 3/4 cup Sugar 1/4 ts Butter Stir together strawberries, lemon juice, sugar and butter in an 8-cup microwave-safe measuring cup. Microwave on 100 percent power for 4 minutes, then stir and continue to microwave at 100 percent power for 4 minutes. Pour into covered container, cool and refrigerate.