Microwave Egg White Cup is a fluffy, Greek-inspired single-serving breakfast with spinach, tomato, and feta. An easy, high-protein 4-minute mug recipe.
Use a mug larger than you think you need, as egg whites puff up and can overflow. Microwave in short bursts instead of one long blast to avoid a rubbery texture. Dry the spinach well so the cup doesn't turn soggy. Microwave wattages vary, so watch closely and adjust timing the first time. For variations, try salsa and cheddar (Tex-Mex), sun-dried tomato and mozzarella (Italian), or added cooked turkey or chicken sausage for extra protein. Best enjoyed fresh; refrigerate leftovers up to a day or two and reheat gently.