Keto Bread (Easy, Fluffy, 5 Ingredients)

Name: Keto Bread (Easy, Fluffy, 5 Ingredients)
Prep time: 10 min
Cook time: 1 h 10 min
Total time: 1 h 20 min
Cuisine: American
Ingredients: 1 cup Wholesome Yum Blanched Almond Flour; 1/4 cup Wholesome Yum Coconut Flour; 2 tsp Baking powder; 1/4 tsp Sea salt; 1/3 cup Unsalted butter ((or 5 tbsp + 1 tsp; measured solid, then melted; can use coconut oil for dairy-free)); 12 large Egg whites ((~1 1/2 cups, at room temperature)); 1 tbsp Besti Monk Fruit Allulose Blend ((can use any sweetener or omit)); 1/4 tsp Xanthan gum ((for texture - omit for paleo)); 1/4 tsp Cream of tartar ((to more easily whip egg whites))