Preheat your oven according to the instructions on the box of the white or yellow cake mix. In a mixing bowl, prepare the cake batter as directed, adding eggs, oil, and water. Mix until smooth and glossy, about 2 minutes on medium speed.

Divide the batter equally among four bowls. Add a few drops of pink, yellow, green, and blue food coloring to each bowl, stirring gently until the batter is evenly tinted. Pour each color into greased round cake pans and bake in the preheated oven for 25-30 minutes, or until a toothpick inserted in the center comes out clean.

Once baked, remove the cake layers from the oven and let them cool in the pans for about 10 minutes. Carefully transfer the cakes to a wire rack to cool completely, which should take about 30 minutes. After they are cool, cut the cake layers into 1-inch cubes, creating the colorful base for your Easter Trifle Dessert.

In a medium mixing bowl, combine the two boxes of instant vanilla or white chocolate pudding mix with 4 cups of cold milk. Whisk thoroughly for about 2 minutes, until the mixture thickens and is smooth. Once ready, place the pudding in the refrigerator for about 10-15 minutes to firm up slightly before assembling.

In a clear trifle dish, start your layering process with a layer of the colorful cake cubes at the bottom. Follow this with a generous layer of pudding, then a layer of whipped topping. Repeat the layers until all components are used, making sure to finish with whipped topping.

For the finishing touch, evenly sprinkle mini chocolate eggs and pastel sprinkles over the top of the whipped topping. If desired, add edible flowers for an elegant look. Cover the trifle with plastic wrap and refrigerate for at least 1 hour.