Preheat the Oven: Follow the temperature instructions on your cake mix box.
Prepare the Pans: Grease and line with parchment paper.
Mix the Batter: Combine the cake mix, eggs, oil, and water. Divide into three bowls and add red to one, blue to another, and leave the third plain.
Bake: Pour each colored batter into separate pans. Bake for 25-30 minutes per layer or until a toothpick comes out clean.
Cool: Let the cakes cool completely on a rack.
Frost the Cake: Place one layer on your plate, spread frosting, then add the next layer. Apply a thin crumb coat over the entire cake.
Decorate: Use black frosting and a piping bag to create Spiderman’s web design. Add candy eyes and sprinkles for details.
Final Touches: Chill the cake briefly to set the frosting.