Easy Gluten-Free Banana Bread

to 3 very ripe bananas (mashed)

melted unsalted butter (, dairy-free use non-dairy butter like Earth Balance, Smart Balance or coconut oil)

baking soda

gluten-free flour ((I like Pillsbury gluten-free))

xanthan gum (, leave out if your flour already has it in it)

salt

granulated sugar

large eggs (, beaten)

pure vanilla extract