Blackberry Rhubarb Buttermilk Cake Recipe

Ingredients (13)

• 1 cup all-purpose flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 stick unsalted butter
• 2/3 cup sugar
• 1/2 teaspoon pure vanilla extract
• 1 large egg
• 1 teaspoon lemon zest
• 1/2 cup well-shaken buttermilk
• 3/4 cup fresh blackberries
• 1/2 cup rhubarb
• 2 tablespoons turbinado sugar