Preheat your oven to 350°F (177°C) and grease a 9×5-inch loaf pan with nonstick spray.

In a medium bowl, whisk together the flour, baking soda, salt, and cinnamon. Set this mixture aside.

In a large bowl, beat the softened butter and brown sugar until it becomes light and creamy.

Add the eggs one at a time, mixing well after each addition. Then, mix in the Greek yogurt, vanilla extract, and mashed bananas until everything is combined.

Gradually mix the dry ingredients into the wet mixture on low speed until just combined. If you want to add nuts or chocolate chips, fold them in at this stage.

Pour the batter into the prepared loaf pan and bake for 60–65 minutes. Halfway through, loosely cover it with foil to prevent over-browning. Check if it’s done by inserting a toothpick into the center; it should come out clean.

Let the bread cool in the pan for 1 hour, then remove it and cool on a wire rack before slicing.