upside down plum and olive oil cake

Ingredients For upside down plum and olive oil cake

• 6-8

  medium plums, pitted and sliced
• 2 c

  all-purpose flour
• 1 3/4 c

  brown sugar
• 1 1/2 tsp

  kosher salt
• 1/2 tsp

  baking soda
• 1/2 tsp

  baking powder
• 1 1/3 c

  best quality olive oil
• 1 1/4 c

  whole milk
• 3

  large eggs
• 1 tsp

  almond extract
• 1 Tbsp

  lemon zest, grated
• 2 Tbsp

  lemon juice
• 6 Tbsp

  champagne (or sparkling cider or club soda or similar)
• lightly sweetened whipped cream, for serving