Orange Poppy Bundt Cake

Name: Orange Poppy Bundt Cake
Ingredients: 2 sticks (16 tablespoons) unsalted butter, at room temperature, plus more for the pan; 3 cups all-purpose flour, plus more for the pan; 1 1/2 teaspoons baking powder; 1 teaspoon kosher salt; 3/4 teaspoon baking soda; 1 3/4 cups granulated sugar; 2 tablespoons orange zest (from about 2 oranges); 3 large eggs plus 2 large egg yolks; 3 tablespoons poppy seeds; 1 teaspoon pure vanilla extract; 3/4 cup buttermilk; 1 cup confectioners' sugar; 1 teaspoon orange zest plus 2 tablespoons orange juice