Put the eggs into the refrigerator and chill for at least 1 hr.
When eggs are thoroughly chilled, mix up your brownie recipe and begin baking.
Remove eggs from refrigerator and cut each in half. During the last 5 minutes of baking, place 1/2 of a creme egg, cut side up, on each brownie. With a 9X12 pan, this would amount to three across and four down. Complete baking. Remove from oven and cool before cutting.