Easy Peach Upside Down Cake - Red Cottage Chronicles

Ingredients

• 5 to 6 fresh peaches (peeled and sliced)
• ¼ cup fresh blueberries (optional)
• 12 tablespoons butter, divided (divided)
• 1 cup dark brown sugar
• ½ cup milk
• 2 large eggs
• ½ tablespoon vanilla extract
• 1 ½ cups all purpose flour
• 2 teaspoons baking powder
• ½ teaspoon salt
• 1 cup granulated sugar
• ½ teaspoon cinnamon
• ½ teaspoon cardamom