Lemon Ricotta Blackberry Muffins

Ingredients (13)

• 2 cups all-purpose flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup granulated sugar
• Zest of 2 lemons
• 1/2 cup unsalted butter
• 1 cup ricotta cheese
• 1 large egg
• 1 tablespoon fresh lemon juice
• 1 teaspoon vanilla extract
• 1 cup fresh blackberries
• Turbinado sugar-for sprinkling on muffin tops