Lemon Poppy Seed Muffins Recipe

Ingredients

• 1 ¼ cups all-purpose flour
• ⅔ cup firmly packed light brown sugar
• 1 tablespoon poppy seeds
• ¾ teaspoon baking powder
• ½ teaspoon kosher salt
• ¼ teaspoon baking soda
• ½ cup whole buttermilk
• ¼ cup unsalted butter, melted
• 1 large egg
• 1 teaspoon vanilla extract
• 4 teaspoons lemon zest, divided
• ¼ cup granulated sugar