Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish.

In a large mixing bowl, combine the boxed white cake mix, eggs, oil, and water as per package instructions.

Divide the prepared batter into three or four separate bowls, adding gel food coloring to each.

Spoon the different colored batters into the greased baking dish, alternating colors to create a marbled effect.

Bake for 28-32 minutes, or until a toothpick inserted comes out clean.

After cooling for about 15-20 minutes, poke holes evenly across the cake's surface.

In a medium bowl, whisk together the instant vanilla pudding and cold milk until thickened.

Pour the pudding mixture over the cake, ensuring it seeps into the holes.

Spread a generous layer of Cool Whip over the top, tinting with food coloring if desired.

Decorate with festive Easter sprinkles or candies before serving.