Kumquat upside-down cake recipe: a simple and tasty treat

Ingredients

• 1½ lbs. kumquats, halved
• 1 stick unsalted butter
• ¾ cup light brown sugar
• 3 T. honey
• ½ tsp. vanilla
• ½ tsp. salt
• 1 1/3 cup flour
• 1½ tsp. baking powder
• ¾ tsp. salt
• 1 cup unsalted butter, softened (if using salted use less salt)
• 1 1/3 cup sugar
• 5 eggs, room temperature
• 1 tsp. vanilla