Spiced Chocolate Cake
1 (16 oz.) pkg. sugar-free devil’s food cake mix
1 (2.24 oz.) cont. ground cinnamon
1 (4 lb.) pkg. granulated sugar
1 (16 oz.) cont. cornstarch
1 (1 oz.) btle. vanilla extract
1 (17 oz.) cont. sugar-free chocolate syrup
1 (6 oz.) cont. raspberries
1 (32 oz.) cont. heavy cream