Step 1 — Prepare your buttercream: Divide your vanilla buttercream into three portions. Color one white (primary base), one black or deep charcoal (secondary detail), and one purple (accent). Ensure your primary base color is at room temperature or soft consistency for smooth piping.
Vanilla buttercream (white base), Black cocoa powder or black food gel, Purple food gel, White food gel (optional, for brightening) Step 2 — Fill your piping bags: Insert a coupler into each piping bag. Transfer each buttercream color into its own bag using a spatula.
Step 3 — Fill the heart mold: Using your white buttercream, pipe your base color into the heart-shaped silicone mold. Fill it to the top without overfilling, then tap the mold against your surface a few times to release any air bubbles.
Step 4 — Attach the cupcake: Place your vanilla cupcake face down onto the buttercream-filled mold. Press gently to ensure it adheres to the base.
Step 5 — Freeze and unmold: Place the cupcake in the freezer for 15 to 20 minutes until frozen and set. Carefully remove it from the mold, keeping the heart and cupcake intact. It's okay if it's a little messy — a butter knife cleans up the edges easily.
Step 6 — Pipe the bottom border: Using black buttercream and Wilton tip #44, pipe a clean ribbon border along the bottom edge of the heart in a vertical wave motion, up and down.
Wilton Piping Tip #44
Step 7 — Add the shell detail: Switch to Wilton tip #16 and pipe a shell border on top of the ribbon border in a steady wave motion. This creates that layered vintage texture along the bottom edge.
Step 8 — Pipe the top purple stripes: Using Wilton tip #47 and purple buttercream, teeth facing up, pipe a stripe down the center of the cupcake with steady pressure. Then pipe one stripe on either side, dividing the cupcake into thirds.
Step 9 — Trim the purple stripes: Using a spatula held at an angle, trim the purple stripes to fit the shape of the heart mold and remove any excess buttercream.
Spatulas
Step 10 — Add the ruffle border: Using Wilton tip #44 and black buttercream, pipe a flat ribbon border along the top left and right edges of the heart, framing either side of the purple stripes.
Wilton Piping Tip #44
Step 11 — Place the gold moon: Place the gold moon sprinkle in the center of the heart.
Gold moon sprinkles
Step 12 — Add the top shell border: Switch to Wilton tip #14 and pipe a shell border on top of the ribbon border in a steady wave motion. This finishes the layered vintage texture along the top edge.