Sweet Potato Pecan Crumble Cake Autumn Dessert Delight

Ingredients

• 1 ½ cups (192g) all-purpose flour, plus more for dusting the pan
• 1 teaspoon baking powder
• ½ teaspoon baking soda
• ½ teaspoon ground cinnamon
• ¼ teaspoon ground nutmeg
• ¼ teaspoon ground ginger
• ¼ teaspoon salt
• ½ cup (1 stick, 113g) unsalted butter, softened
• ¾ cup (150g) granulated sugar
• ¼ cup (50g) packed light brown sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• 1 cup (225g) mashed cooked sweet potato (about 1 medium sweet potato)
• ½ cup (120ml) buttermilk
• ½ cup (60g) all-purpose flour
• ¼ teaspoon ground cinnamon
• ¼ cup (57g) cold unsalted butter, cut into small cubes
• ½ cup (50g) chopped pecans