Serves 8-10
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1 cup all-purpose flour
¾ teaspoon ground cardamom
¾ teaspoon baking powder
¼ teaspoon kosher salt
2 large eggs, at room temperature
¾ cup granulated sugar
3 tablespoons cognac (Calvados, rum, or bourbon work well, too)
½ teaspoon vanilla extract
â…“ cup well-shaken buttermilk, at room temperature
3 medium Honeycrisp apples
1 stick unsalted butter, melted and cooled, plus more for greasing the pan
1 tablespoon turbinado sugar
Confectioners’ sugar, for dusting