Preheat your oven to 350°F (175°C) and grease a 9-inch square baking pan. Prepare the brownie mix by combining it with the eggs, water, and oil as instructed on the package. Pour the mixture into the prepared pan and spread evenly. Bake for 20-25 minutes, or until a toothpick inserted in the center comes out with moist crumbs. Allow the brownies to cool completely in the pan.

Once the brownies are completely cooled, take them out of the pan and place them on a serving platter. Using a spatula, spread a generous layer of dark purple frosting over the entire brownie surface. Let the frosting set slightly while you gather your decorations.

Carefully place 9 Peep Ghosts on the frosted brownies, spacing them evenly. Gently press them into the frosting to ensure they stay in place.

Sprinkle colorful sprinkles over the Peep Ghosts and the frosting. Once decorated, they are ready to be cut into squares!

Using a sharp knife, cut the brownies into generous squares or rectangles. Serve them on a festive platter.