Cut your parchment paper to fit your pan perfectly, then use an edible marker to trace your desired design onto the parchment paper.

Preheat the oven to 375 degrees F and grease your pan with cooking spray and line it with the designed parchment paper.

Separate the egg whites from the egg yolks. Place the egg whites in a large bowl and the egg yolks into an even larger bowl.

Whisk together the egg yolks, sugar, vegetable oil, milk, and vanilla until smooth.

Sift the flour and cornstarch into the egg yolk mixture. Whisk until the batter is nice and smooth.

In the bowl of a stand mixer fitted with a whisk attachment, whisk the egg whites until frothy. Slowly add the sugar and vinegar to the egg whites.

Whisk the egg whites until stiff peaks form.

Add the egg whites to the egg yolk mixture. Gently fold in the egg whites.

Use small bowls to dye each color that you will need to make your design. Place each color into a piping bag.

Pipe the design with your desired colors. Freeze it for 5-8 minutes.

Pipe the original, uncolored batter on top of the frozen design.

Bake for 8-10 minutes or until golden brown on the edges.

Flip the pan onto parchment paper and peel off the parchment paper to reveal the design.

Let the cakes cool before assembling.

To make the Whipped Cream, whisk the cream, sugar, and vanilla until stiff peaks have formed.

Layer the cakes with evenly spread whipped cream between each layer; adding fresh fruit is optional.