gooey chocolate cast iron skillet cake

Ingredients

• 1 cup all purpose flour
• 1/2 teaspoon baking soda
• 1 cup sugar
• - dash of salt
• 1/2 stick butter, cold
• 1/4 cup vegetable oil
• 2 tablespoons cocoa powder
• 1/2 cup water, cold
• 1 - egg
• 1/4 cup milk or buttermilk
• 1/2 teaspoon vanilla extract
• CAKE INGREDIENTS
• FROSTING INGREDIENTS
• 1/2 stick butter, cold
• 2 tablespoons cocoa powder
• 3 tablespoons milk for consistancy
• 1/2 cup pecans chopped
• 2 cups powder sugar
• 1/2 teaspoon vanilla extract