Blackberry Cornbread Buckle

Ingredients

• Cobbled Cake
• 4 cups fresh blackberries
• 1/2 cup sugar
• 1 teaspoon freshly grated lemon zest
• 1 teaspoon rosewater
• 1/2 teaspoon ground cardamom
• 6 ounces unsalted butter, softened
• 1 1/2 cups sugar
• 1 teaspoon vanilla extract
• 1/2 teaspoon salt
• 3 eggs
• 1 1/2 cups all-purpose flour
• 3/4 cup cornmeal
• 2 1/4 teaspoons baking powder
• 1 cup buttermilk
• 1 batch crumb topping, recipe below
• Oatmeal Crumb Topping
• 1/2 cup all purpose flour
• 1/2 cup rolled oats
• 1/3 cup dark brown sugar
• 1/2 teaspoon cinnamon
• 1/8 teaspoon baking soda
• 4 tablespoons unsalted butter, cold and cut into cubes