Blueberry Upside-Down Mini Cakes

Ingredients (12)

• + 2 cups frozen blueberries add to pantry
• ✓ 1 lemon, zested and juiced, divided
• + 2 tablespoons white sugar add to pantry
• + 2 tablespoons unsalted butter add to pantry
• + 2 tablespoons brown sugar add to pantry
• ✓ 2 eggs
• + 1 ½ teaspoons vanilla extract add to pantry
• + 1 ¼ cups all-purpose flour add to pantry
• + 1 ¾ teaspoons baking powder add to pantry
• + ½ teaspoon ground ginger add to pantry
• ✓ 1 pinch salt
• + ½ cup milk add to pantry