Big Mashed Potato and Apple Cake

• 40 grams Butter (melted)
• 100 grams Vegetable oil
• 160 grams Sugar
• 3 Eggs (at room temperature)
• 1/2 tsp Salt
• 1 dash Vanilla extract
• 1 Apple
• 300 grams Sweet potato
• 250 grams White flour
• 2 tsp Baking powder

1. Measure out your ingredients.
2. Peel the apple and sweet potatoes and chop them into 1 cm chunks.
3. Soak the sweet potatoes in water.
4. Put the butter in a large bowl and melt in the microwave.
5. Next, mix in the ingredients from the list, starting at the top, one at a time.
6. First, mix in the apples and sweet potatoes with a whisk, then with a rubber spatula.
7. Last, add the dry ingredients.
8. Mix until there are no flour streaks, but avoid over-mixing.
9. Line the baking sheet with some cooking paper and pour the batter on top.
10. It will feel rather heavy and appear chunky.
11. Bake in an oven at 180C for 30-40 minutes until it has browned.
12. Once baked, transfer from the pan onto some newspaper.
13. Please give the sister recipe a try.
14. "Cocoa Powder Brownie"

butter, vegetable oil, sugar, eggs, salt, vanilla, apple, sweet potato, white flour, baking powder

Taken from cookpad.com/us/recipes/158907-big-mashed-potato-and-apple-cake (may not work)