Cozy Apple Cake

Ingredients

• butter, to taste, softened, for greasing the pan
• 1 1/2 cups brown sugar
• 1/3 cup canola or olive oil
• 1 egg
• 1 cup buttermilk
• 1 teaspoon vanilla
• 1 teaspoon baking soda
• 2 1/2 cups flour
• salt, to taste
• 2 1/2 cups Honeycrisp apples, optionally peeled and chopped
• 1/2 cup white sugar
• 1 teaspoon cinnamon
• 1 tablespoon butter, melted
• powdered sugar, optional, to taste, for topping