Gingerbread Cake

INGREDIENTS

• 1/2 teaspoon baking powder
• 1 tablespoon powdered sugar
• 1/2 cup (packed) light brown sugar
• 1/2 cup (1 stick) unsalted butter, cut into 1/2" pieces
• 1 teaspoon ground ginger
• 1 cup chilled heavy cream
• 3/4 teaspoon kosher salt
• 1/2 cup mild-flavored (light) molasses
• Finely grated lemon zest
• 2 teaspoons grated peeled ginger
• 1 large egg, beaten to blend
• 1/4 cup store-bought lemon curd
• 1/2 teaspoon baking soda
• 3/4 teaspoon ground cinnamon
• 1 1/2 cups all-purpose flour
• Nonstick vegetable oil spray