6tablespoonsunsalted butterroom temperature or softened
3cupsconfectioners sugaraka powdered sugar
2teaspoonsmaple extractor vanilla extract
¼teaspoonsalt
Instructions
Preheat the oven to 350º F. Spray a 13" x 9" cake pan with cooking spray.
Add butter, oil, sugar, and eggs to a large mixing bowl. Beat with a mixer at medium speed for 3 minutes, until light in color and creamy.
In a separate bowl, stir together dry ingredients: flour, spices, and baking soda. Add to wet ingredients and stir on low speed for 30 seconds or fold together with a spoon by hand. Stir in apples and sourdough starter discard by hand until mixed together, about 30 seconds.
Pour sourdough apple cake batter into the prepared cake pan. Bake for 35-40 minutes until a toothpick inserted into the middle comes out clean. Let cool completely before frosting.
Cream Cheese Frosting
In a medium mixing bowl, cream together cream cheese, butter, and confectioners sugar on medium speed until smooth and creamy. Add salt and maple extract.
Add frosting to the top of the cooled cake and serve.