To make a Prismatic Burger in Grow a Garden, use the recipe:

• 1 Tomato
• 1 Corn
• 3 Bone Blossoms

These ingredients are combined in the cooking pot to create the Prismatic Burger. Note that Bone Blossoms are rare and important for making high-rarity cooking recipes like this one. The Prismatic Burger is considered a high-tier food item that can give better rewards in the game.