This Marble loaf cake is swirled with vanilla and chocolate cake flavor. The best thing about it is that you only have to make one batter instead of two! This loaf cake is moist and fluffy and can be topped with a chocolate drizzle or left unfrosted. It's that good!
Preheat the oven to 350 F. Heavily spray a 9" x5" loaf with baking spray.
In the bowl of a hand or stand mixer fitted with the paddle attachment add the 1/2 cup butter and 1 cup sugar and mix on low-medium speed for 2 minutes. Add the 2 tbsp vegetable oil and mix again until combined. Add the eggs one at a time on medium speed, mixing in between.
In a separate bowl combine the 2 cups flour, 1/2 tsp baking powder, ¼ tsp baking soda, and 1/4 tsp kosher salt and mix lightly.
In a measuring cup add the 1/2 cup buttermilk and 1 tbsp vanilla extract and set aside.
Alternate adding the dry and wet ingredients by thirds starting and ending with the dry ingredients.
Separate 3/4 cup of the batter and add the 2 tbsp cocoa powder and remaining 1 tbsp buttermilk. Stir to combine.
Add a thin layer of vanilla batter to the bottom of the pan, then alternate adding scoops of the vanilla and chocolate batters into the loaf pan using an ice cream scoop until all the batter is used up.
Using a skewer or knife, swirl the batters together. Be careful not to swirl too much or you the batter will blend and you wont be able to see the swirl.
Bake in the preheated oven for 50-55 minutes. The loaf cake is done when a skewer is inserted into the middle of the cake and comes out with only a few loose crumbs.
Learn how to soften butter quickly if your butter is not soft.If you dont have an ice cream scoop to scoop the batter you can use a large spoon instead.