To prepare a the brunch box recipe, first you need to gather your ingredients. First, you'll need the following ingredients: Eggs, milk, butter, salt, and pepper to taste. Then, add the ingredients to the mixing bowl and mix until combined. Pour the batter into the muffin tin and bake at 350 degrees for 20 minutes. Remove from the oven and let cool for 5 minutes before slicing into squares and storing in an airtight container in the fridge for up to 3 days.