Dry bananna bread

[debbie in seattle]

Have a great recipe but lately, it's dry. Basic ingredients, stick of butter, eggs, sugar, 3 smashed banannas, 1 tbsp milk, flour. Not over mixing, using a spoon to mix when I combine the wet and dry ingredients, baking at 325 for a little over an hour. Any suggestions, don't want to try a new recipe, just tweek this one.
Thanks!