Real Deal Southern Caramel Cake

Ingredients

• 1 cup unsalted butter room temperature 2 sticks
• 1/3 cup vegetable oil
• 2 1/2 cups granulated sugar
• 3 cups cake flour sifted
• 6 large eggs room temperature
• 2 large egg yolks room temperature
• 1 teaspoon baking powder
• 1/2 teaspoon salt
• 1 cup sour cream
• 2 tablespoons pure vanilla extract
• 1 1/2 sticks butter
• 2 cans evaporated milk 12 ounces each
• 2 cups granulated sugar
• 2 teaspoons pure vanilla extract