apple cake with cinnamon whipped cream

Name: apple cake with cinnamon whipped cream
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 1 cup brown sugar; 3/4 cup buttermilk (or 3/4 cup milk + 2 tsp apple cider vinegar); 1/4 cup oil ((canola, vegetable, or olive)); 1 egg; 1 tsp vanilla; 1 3/4 cup flour (230 grams); 1 tsp cinnamon; 1/2 tsp baking soda; 1/2 tsp baking powder; 1/2 tsp salt; 2 cups apples, peeled and cubed ((any apple variety will work)); 1 cup heavy cream; 2 tbsp powdered sugar; 1/2 tsp cinnamon