One-Bowl Upside-Down Cake

Ingredients

• 1 1/3 cups all-purpose flour
• 1 1/4 teaspoons baking powder
• 1/4 teaspoon baking soda
• 3/4 teaspoon kosher salt
• 2/3 cup granulated sugar
• 2 large eggs, lightly beaten
• 2/3 cup sour cream, room temperature
• zest of half lemon
• 3 tablespoons unsalted butter, melted, plus more for greasing pan
• 1/2 cup packed light brown sugar
• 4 tablespoons unsalted butter, cubed
• 1/4 cup honey
• 10 ounces fresh peaches (frozen ones are fine too.)
• 5 ounces fresh blackberries (frozen ones work as well)
• 3/4 cup heavy cream, lightly whipped, for serving (optional)