Blackberry and Apple Cake | Saveur

Ingredients

• 3⁄4 cup softened unsalted butter, plus more for greasing pan
• 1 1⁄2 lb. fresh blackberries (about 6 cups)
• 1 tbsp. dark brown sugar
• 3 granny smith apples, cored, peeled, and quartered
• 1⁄3 cup apple brandy, such as calvados
• 2 1⁄2 cups cake flour
• 2 1⁄4 tsp. baking powder
• 1 tsp. ground cinnamon
• 1⁄2 tsp. fine salt
• 3⁄4 cup milk
• 1 1⁄2 tsp. vanilla extract
• Zest of 1 lemon
• 1 cup plus 2 tbsp. superfine sugar
• 4 eggs
• Crème fraîche, for garnish (optional)