Preheat Oven:

Preheat your oven to 350°F (175°C). Grease and flour a 9x5-inch loaf pan, or line it with parchment paper.

Mix Dry Ingredients:

In a medium bowl, whisk together the flour, baking soda, salt, and cinnamon (if using). Set aside.

Combine Wet Ingredients:

In a large mixing bowl, beat the eggs, granulated sugar, and brown sugar until smooth. Stir in the vegetable oil, vanilla extract, and mashed bananas. Mix until well combined.

Add Pineapple and Coconut:

Fold the crushed pineapple, shredded coconut, and optional macadamia nuts into the wet mixture.

Combine Wet and Dry Ingredients:

Gradually add the dry ingredients to the wet mixture, stirring until just combined. Do not overmix.

Pour into Pan:

Pour the batter into the prepared loaf pan and smooth the top.

Bake:

Bake in the preheated oven for 55-60 minutes, or until a toothpick inserted into the center comes out clean.

Cool and Serve:

Allow the banana bread to cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely before slicing.