Ultimate Lemon Poppy Seed Muffins

• 1 cup granulated sugar
• 2 teaspoons lemon zest, usually from two large lemons
• 3 cups all-purpose flour not packed
• 1 tablespoon baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• 1 whole milk 1/2 cup, whole or full-fat
• 2 egg large, at room temperature
• 1/2 teaspoon lemon extract
• 1 unsalted butter stick (4 ounces), melted and slightly cooled
• 1 teaspoon lemon juice
• 1/3 cup poppy seeds
• 1/4 cup lemon curd

For the glaze:

• 1 cup confectioners' sugar
• 2-3 tablespoons lemon juice
• 1 teaspoon lemon zest, usually from one lemon
• 1/4 teaspoon salt
• 1/4 teaspoon lemon extract use as needed, optional