Grease mug with butter, crack eggs into mug and mix together well with a fork.
Add in the cooked ham, cheese, and spring onion.
Season with salt and pepper and stir to combine.
Microwave on high for 90 seconds. If the egg is not cooked enough, microwave in 10-15 second intervals until cooked through. Do this carefully as the eggs can become rubbery if overcooked.
Notes
This makes a total of 1 serving of 90-Second Loaded Keto Egg Cups. The serving comes out to be 369 calories, 25.9g fats, 2.7g net carbs, and 30g protein.