In a small bowl, combine the egg, water, and buttermilk and mix well.
Then add the flour blend, baking powder, and sugar to the wet ingredients and stir until well combined.
Pour the mixture into an uncovered sandwich container.
Put the container in your microwave and cook for 85 seconds. (Could take slightly more or less time, depending on your microwave, so keep an eye on it.)
When the timer goes off, prepared to be amazed by warm, spongy, gluten-free bread!
Transfer the bread onto a rack to cool completely, then cut into two slices.
Use your bread slices to make any sort of sandwich your heart desires! I love using it for grilled cheese sandwiches, but I’ve also used it for peanut butter and jelly with equally delicious results!