Making a Hyperrealistic RED Onion CAKE
Making a Hyperrealistic RED Onion CAKE is a medium American recipe that serves 8. 350 calories per serving. Recipe by Sideserf Cake Studio on YouTube.
Prep: 1 hr 40 min | Cook: 30 min | Total: 2 hrs 30 min
Cost: $52.67 total, $6.58 per serving
Ingredients
- 1 cake Red Velvet Cake (pre‑made 9‑inch round cake, trimmed to a 4‑inch diameter sphere)
- 2 cups Cream Cheese Buttercream (purple tinted, used for crumb coat and final covering)
- 8 oz Modeling Chocolate (softened for sculpting, adds realistic onion layers)
- 6 sheets Vanilla Wafer Paper (edible wafer (rice) paper used as onion skin)
- 2 tsp Purple Food Coloring (gel) (deep purple for dyeing wafer paper)
- 1 tsp Dark Brown Food Coloring (gel) (for shading crevices)
- 1 tsp Light Brown Food Coloring (gel) (for highlights on the onion skin)
- 1 cup Water (for diluting food coloring and wetting brushes)
Instructions
Create Edible Onion Skins
Wet the soft bristled mop brush with water, dip it into purple gel food coloring, and paint large swaths onto one side of a wafer paper sheet. Flip the sheet and repeat on the other side until the paper is fully saturated.
Time: PT15M
Dry and Peel Wafer Paper
Lay the painted wafer paper onto a real red onion (or a shaped mold) and let it sit overnight to dry completely. The next day, gently peel the paper away from the onion, trying not to tear it.
Time: PT10M
Shape Red Velvet Cake Ball
Trim the pre‑made red velvet cake into a sphere about 4 inches in diameter using a small knife. Keep the cake chilled to make cutting easier.
Time: PT10M
Crumb Coat with Purple Buttercream
Spread a thin, even layer of purple cream cheese buttercream over the cake ball to seal in crumbs.
Time: PT5M
First Wafer Paper Layer
Place one saturated wafer paper sheet onto the crumb‑coated cake, smoothing gently to avoid air bubbles.
Time: PT5M
Add Modeling Chocolate Texture
Roll modeling chocolate into thin sheets, press them onto the cake surface, and sculpt with sculpting tools and a hard bristled brush to mimic the natural layers of an onion.
Time: PT10M
Roll Wafer Paper for Cone
Take another wafer paper sheet, roll it tightly into a cone shape, and fray the tip with scissors to resemble the pointed end of a red onion.
Time: PT10M
Paint Lines and Shading
Using diluted dark brown and light brown food coloring, paint thin lines and add shadows/highlights on the wafer paper and chocolate crevices to enhance depth.
Time: PT10M
Layer Onion Skins
Starting with the less‑perfect skins, gently adhere each wafer paper skin onto the cake, finishing with the prettiest skins on the outside. Use a dab of buttercream as edible glue if needed.
Time: PT10M
Chill Cake
Cover the assembled onion cake and refrigerate for at least 30 minutes to set the layers and firm the buttercream.
Time: PT30M
Temperature: 4°C
Nutrition Facts
- Calories
- 350
- Protein
- 4g
- Carbohydrates
- 45g
- Fat
- 15g
- Fiber
- 1g
Dietary info: Vegetarian, Contains dairy, Contains gluten
Allergens: Eggs, Wheat (gluten), Dairy, Soy
Last updated: April 15, 2026








