Preheat the oven to 325 degrees F (165 degrees C). Lightly grease a 10-inch square baking dish. Combine tomato soup and baking soda in a bowl; set aside.
Beat sugar, butter, egg, cinnamon, cloves, and salt in a large bowl with an electric mixer until smooth. Mix in tomato soup and soda mixture; stir in flour and raisins. Pour cake batter into a greased baking dish.
Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 1 hour.
1 (10.75 ounce) can tomato soup (such as Campbell's®)
½ cup milk
3 eggs
¼ teaspoon ground cinnamon
Instructions
Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13-inch cake pan and set aside.
Whisk cake mix, tomato soup, milk, eggs. and cinnamon together in a bowl until well combined. Pour into the prepared pan.
Bake in the preheated oven until a toothpick inserted into the center comes out clean, 28 to 33 minutes. Cool on a wire rack for 5 minutes. Run a table knife around the edges to loosen. Invert carefully onto a serving plate or cooling rack. Let cool completely.