Prep your cake layers. Level the tops with a serrated knife if needed.
If you like extra moisture, lightly brush the tops with simple syrup. Place one layer on a cake board or a plate.
Make the buttercream. Beat butter until creamy, 2 minutes. Add powdered sugar in batches, mixing on low.
Add vanilla, salt, and milk a little at a time until smooth and spreadable. You want it soft but not runny.
Fill and stack. Spread a generous layer of buttercream on the first cake layer. Top with the second layer.
Press gently to even it out.
Crumb coat. Spread a thin layer of buttercream over the entire cake to lock in crumbs. Chill in the fridge 20–30 minutes until set. This step keeps your final coat neat.
Tint the frosting. Reserve about 1/4 cup white frosting for the eyes if you’re not using candy melts.
Tint the rest bright red using gel coloring. Add color gradually and mix well. Use no-taste red to avoid bitterness.
Final red coat. Frost the cake with the red buttercream.
Smooth with a spatula or bench scraper. Don’t worry if it’s not perfect—Spiderman’s web will cover small flaws. Chill 10–15 minutes.
Make the eyes. Option A (buttercream): Pipe two large almond-shaped eyes with white frosting.
Smooth with a clean spatula.
Option B (candy melts): Melt, pipe eye shapes onto wax paper using a template underneath, let set, then place on cake.
Outline the eyes. Tint a small amount of frosting black. Fit a piping bag with a small round tip. Pipe a bold black line around each white eye.
Clean edges make the face pop.
Draw the web. Start by piping a vertical line down the center, then a horizontal line across the middle, forming a cross. Add two diagonal lines to make a “spoke” pattern—like a wheel. Next, connect the spokes with curved lines, working from the center outward.
Keep the curves gentle and evenly spaced.
Clean up. Wipe any smudges with a clean, slightly warm spatula or a toothpick. Chill the cake 10 minutes to set the lines.
Finish and serve. Add sprinkles around the base if you like. Place on a stand and get ready for big smiles.