Place the red candy puddles on top of the crumble under the drips.

Place the red hard candy drips around the sides of the cake, positioning them near the top.

Sprinkle the chocolate peanut butter candies, mini chocolate peanut butter cups, and chocolate-coated caramel bites evenly over the crumble.

You may not need to use all of the crumble.

Add the volcanic crumble around the base of the cake, and partially covering the candy puddles.

Place the melted blue-green candy puddles around the edges of the platter.

Assemble the volcano cake: Carefully transfer the cake to a platter at least 12 inches (30 cm) wide, positioning it near one corner.

Make the volcanic crumbles: Add 2 cups (230 G) of frosting to the bowl of cake scraps and mix with an electric hand mixer until coarsely crumbled.

Refrigerate for at least 20 minutes, up to overnight.

Frost the outside of the cake with 4 cups (460 G) of frosting.

Make sure to leave a layer of cake at least 1-inch (2 ½ cm) thick around the jar.

Carve the volcano: Using a sharp serrated knife, carefully trim down the sides of the cake at an angle so that the base is wider than the top.

Refrigerate at least 20 minutes, up to 1 hour. Use your hand to lightly push the mason jar in until the top is level with the cake. Place an 8-ounce mason jar in the hole in the center. Repeat with the remaining 2 cakes with the holes in the center. Place the other whole cake on top and repeat frosting. Using an offset spatula, spread about ½ cup (85 G) of frosting evenly over the top of the cake.

Spread a dab of chocolate frosting in the center of the cardboard.

Assemble the cake: Place a 9-inch (22 cm) cardboard round on a cake turntable.

Use a 3-inch (7 cm) round cookie cutter to punch out holes in the centers of 2 of the cakes. Remove the baking sheet from the oven and very carefully tip the pan so the melted candy slides down, creating a drip effect.

For the lava drips, position the remaining 8 red hard candies at least 1 inch (2 ½ cm) apart along a long side of the baking sheet, at least 1 inch (2 ½ cm) from the edge.

Bake for 4–6 minutes, until melted into pools.

Place the remaining 4 butterscotch candies directly next to each red candy. Place 4 red hard candies at least 1 inch (2 ½ cm) from the clusters and the edges of the pan.

For the lava and water puddles, arrange 4 evenly spaced clusters of 3 blue and 1 green hard candies on a baking sheet.

Red volcano box