apple blueberry coffee cake

Ingredients For apple blueberry coffee cake

• 1/2 c

  white sugar
• 1/2 c

  unsalted butter
• 2

  eggs
• 1-1/2 c

  all purpose flour
• 1-1/2 tsp

  pure vanilla extract
• 1-3/4 tsp

  baking powder
• 1/2 c

  milk
• 1

  apple
• 1/4 c

  brown sugar
• 1 tsp

  cinnamon
• 1/3 c

  blueberries, fresh
• 1/2 c

  milk
• 1 Tbsp

  olive oil, extra virgin
• 2 Tbsp

  sour cream