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

In a large bowl, whisk the eggs until frothy, then mix in Greek yogurt and melted butter or coconut oil until smooth.

Combine the baking powder, salt, and xanthan gum with the wet mixture, stirring until there are no clumps. If using almond flour, fold it in now.

Pour the batter into the prepared loaf pan, smoothing the top with a spatula.

Bake for 35-45 minutes until golden. Test doneness with a toothpick; it should come out clean.

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