Healthy Cornmeal Muffins with Berries & Lemon

INGREDIENTS

• 1 cup cornmeal
• 1 cup + 1 tbsp whole wheat pastry flour, divided
• 1/4 cup granulated sugar
• 1 tsp grated lemon zest
• 1 tsp baking powder
• 1 tsp baking soda
• 1 tsp salt
• 2 eggs
• 1 cup low-fat buttermilk
• 1/4 cup non-fat plain Greek yogurt
• 1 tbsp olive oil
• 1 cup frozen berries