1. Prepare the Oven and Muffin Tin: Getting Ready to Bake

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Grease Muffin Tin: Generously grease a 12-cup muffin tin with non-stick cooking spray or olive oil. This is crucial to prevent the egg muffins from sticking.
   • Tip: You can also use silicone muffin liners for even easier removal.

2. Prepare the Egg Mixture: The Foundation of the Muffins

1. Whisk Eggs: In a large mixing bowl, whisk together the 8 large eggs until they are well beaten and slightly frothy.
2. Add Milk (Optional): If you want fluffier egg muffins, add ¼ cup of milk to the eggs and whisk until combined.
3. Season: Season the egg mixture with salt and pepper to taste.

3. Add Mix-Ins: Customizing Your Egg Muffins

1. Stir in Cheese and Onions: Add the shredded cheddar cheese and finely diced green onions to the egg mixture. Stir until well combined.
2. Add Protein (Optional): If using, add the cooked and crumbled bacon, sausage, or chopped ham to the bowl. Stir to distribute evenly.
3. Incorporate Other Ingredients (Optional): If you’re adding other vegetables or spices, add them now and stir until just combined.

4. Fill Muffin Cups: Portioning the Mixture

1. Pour Evenly: Carefully pour or spoon the egg mixture into the prepared muffin cups, filling each cup about ¾ full.
   • Tip: An ice cream scoop or a ladle can help with even portioning.

5. Bake to Perfection: Achieving Fluffy and Golden Muffins

1. Bake: Place the muffin tin in the preheated oven.
2. Baking Time: Bake for 18-20 minutes.
   • Check for Doneness: The egg muffins are done when they are fully set, the tops are lightly golden, and a toothpick inserted into the center comes out clean.

6. Cool and Serve: Enjoying Your Egg Muffins

1. Cool in Tin: Remove the muffin tin from the oven and let the egg muffins cool in the tin for about 5 minutes. This allows them to firm up slightly and makes them easier to remove.
2. Serve Warm: Carefully remove the egg muffins from the tin and serve them warm.