Preheat your oven to 350°F (175°C) and prepare a loaf pan with parchment paper or grease it.

In a mixing bowl, whisk the eggs, Greek yogurt, and melted butter or coconut oil until smooth.

In a separate bowl, combine baking powder, salt, and xanthan gum (if using). Fold into the wet ingredients.

Transfer the batter to the prepared loaf pan and smooth the top with a spatula.

Bake for 35-45 minutes until golden brown and a toothpick comes out clean.

Let the bread cool in the pan for 10 minutes, then turn it out onto a wire rack to cool completely.