1-2 tablespoons melted butter
3 cups all-purpose flour, plus 1 tablespoon for dusting pan
1 teaspoon salt
1 teaspoon baking powder
1/2 teaspoon baking soda
1 cup (2 sticks) unsalted butter, at room temperature
2 cups white sugar
4 eggs
1 cup buttermilk, at room temperature
2 teaspoons vanilla
FOR THE GLAZE:
3/4 cup white sugar
1/3 cup unsalted butter
3 tablespoons water
2 teaspoons vanilla