Real Deal Southern Caramel Cake

Name: Real Deal Southern Caramel Cake
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Southern
Ingredients: 1 cup unsalted butter, room temperature (2 sticks); ⅓ cup vegetable oil; 2 ½ cups granulated sugar; 6 large eggs (room temperature); 2 large egg yolks (room temperature); 1 tablespoon pure vanilla extract; 3 cups cake flour, sifted; 1 teaspoon baking powder; ½ teaspoon salt; 1 cup sour cream; 1 ½ sticks butter; 2 cans evaporated milk (12 ounces each); 2 cup granulated sugar; 2 teaspoons pure vanilla extract