01 -
Heat candy corn and water in a saucepan over medium heat, stirring occasionally until fully melted. Remove from heat and let cool.
02 -
In a large bowl, whisk together cake mix, eggs, egg yolk, milk, melted butter, mayonnaise, and vanilla extract until smooth.
03 -
Separate batter evenly into three bowls. Add yellow gel food coloring to one bowl, orange gel food coloring to another, and leave the third plain.
04 -
Pour each colored batter side by side into a greased 9x13 inch baking dish. Use a butter knife to gently swirl the colors together.
05 -
Bake at 350°F (175°C) for 24 to 26 minutes. With 5 minutes remaining, combine sweetened condensed milk with candy corn syrup and heat gently until incorporated.
06 -
Remove cake from oven and immediately poke holes all over the warm cake using a fork. Pour the warm candy corn syrup mixture evenly over the cake. Let cool completely.
07 -
Once cooled to room temperature, spread whipped cream cheese frosting evenly over the top.
08 -
Cover and refrigerate the cake for at least 2 hours or overnight. Just before serving, garnish with candy corn and slice.