"So yummy, yet incredibly easy to make! This recipe comes from Goosberry Patch Almost Homemade Cookbook...."
INGREDIENTS
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1 tablespoon cornstarch
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1 (15 ounce) can blackberries, drained and juice reserved
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1 teaspoon lemon juice
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1 (8 ounce) package refrigerated cinnamon rolls
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frozen whipped topping, thawed