Preheat your oven to 325°F / 163°C.
Line a 9 by 5-inch loaf pan with parchment paper, leaving a 1-inch overhang on the sides to easily lift the bread out later.
In a large mixing bowl, whisk together the almond flour, salt, shredded cheese, and baking powder until everything is evenly combined.
In a separate, clean bowl, whip the egg whites until stiff peaks form. You can use a stand mixer, electric beaters, or a hand whisk. Gently fold the cooled melted butter into the egg whites, followed by the almond flour mixture. Be careful not to overmix—fold just until combined to keep as much air in the batter as possible.
Carefully transfer the batter into your prepared loaf pan, spreading it evenly.
Sprinkle about 2 teaspoons (10 ml / 0.3 fl oz) of your chosen toppings over the top.
Place the pan on a middle rack in the oven and bake for about 35 minutes, or until the loaf has risen and is a beautiful golden brown.
Remove from the oven and let the loaf cool in the pan for 10 minutes.
Then, use the parchment paper overhangs to lift it out and place it on a wire rack to cool completely before slicing.
Store any leftovers in an airtight container in the refrigerator for up to 4 days.
Let the bread cool completely before slicing! Slicing it while warm can cause it to be gummy and fall apart.
Patience is key for the perfect, sturdy slice.
Don't toss those leftover egg yolks! Use them to make a rich keto custard, hollandaise sauce, or add them to scrambled eggs for extra creaminess.