Lemon Buttermilk Mini Loaves

for the mini loaves:

1 cup (2 sticks) unsalted butter, at room temperature

1 ¾ cups sugar

4 large eggs, at room temperature

2 2/3 cups all-purpose flour

1 teaspoon baking soda

¼ teaspoon salt

1 ¼ cups buttermilk

1 tablespoon lemon zest

4 tablespoons lemon juice

for the glaze:

1 tablespoon lemon juice

¾ cup confectioners’ sugar, plus more as needed

1 tablespoon cold water, plus more as needed