Preheat the oven to 350°F and generously grease and flour a 10-inch bundt pan, ensuring to grease the nooks and crannies for easy removal later on.
In a large bowl combine flour, sugar, salt, baking soda and cocoa powder. Mix the dry ingredients and set aside.
In another bowl whisk, vegetable oil, egg, whole milk, vinegar, sour cream and vanilla extract. Add in the dry ingredients and beat until well combined. Add red food color until you get your desired red color.
Pour half of the prepared cake batter into the bundt pan. Spread it evenly across the bottom. Carefully add the cream cheese filling over the batter, ensuring to leave about a 1-inch space from the edges of the pan. Finish by pouring the remaining cake batter on top of the cream cheese filling in the pan.
Bake for 55-65 minutes or until thoothpicks inserted comes out clean. Allow the cake to cool completely in the bundt pan before removing.