Homemade Ice Cream in a Jar~Combine whipping cream, sugar and vanilla in a ziplock bag. Place inside the mason jar and then fill to the brim with ice. Put the lid on the jar, and .shake, shake, shake! This will take about 5-10 minutes of shaking to freeze your ice cream. Perfect for your kids Birthday Party, a Boy/Girl Scout Troops activity or a Holiday Family GetTogether!